Twilight keeps walking back and forth, waiting for her sister in law to show up. "Calm down, Twilight. Cadence will be here any minute. Then, she'll spend the entire weekend with you." said Applejack. "I know, but this is important. Not just for me, but for her." said Twilight. "She really does love you. You know that." said Fluttershy. "She loves us, too." said Rainbow Dash.

Then all of the sudden, trumpets were heard as they know the princess is coming. A carriage drove through town and stopped in front of the castle. A guard opened the door and out came Princess Cadence. Twilight and her friends smiled happily as she walked toward them. "Hello, girls. Ready to spend the weekend together?" she said. "Yes, we are. Right this way, Princess." said Twilight as she leads her to her new home.

"Wow, you guys did an amazing job creating this castle." said Cadence. "Do you still remember this?" said Twilight. "Oh, let me guess." said Cadence. "Sunshine, sunshine. Ladybugs awake. Clap your hooves and do a little shake." they both said. "What was that?" Pinkie asked. "It was a thing Twilight and I did when we were little." said Cadence.

Then suddenly, the Book of Disney is calling them. "What's that?" Cadence asked. "Oh, we've been doing this for a long time now. Want to see what we've been doing?" Twilight asked. The mane six lead Cadence to the Book of Disney. "Oh my, is that a book?" Cadence asked. "It's not just any book, it's the Book of Disney. We go on many adventures in there. To start things off, Twilight reads the introduction, then we go right in." Rarity explained. Twilight opens the book and opens to the next chapter. The next story is Atlantis: The Lost Empire. She begins to read,

"A long time ago, there was a city called Atlantis that sunk into the ocean. A giant wave of water was approaching and everyone ran for their lives. Not everyone made it out from the tragedy. The Queen was summoned by the crystal and was gone forever. But, the crystal created a large shield to protect the city from the ocean water. After that, it was gone forever.

Many years later, a young man named Milo Thatch has been studying about the city and knows that it's still out there. But, his boss thought he was crazy and he made it up. When he got home, he met a woman named Helga Sinclair who tells him to meet a man named Mr. Whitmore. He's the one who want to look for Atlantis too and also knows Milo's grandfather. He gave Milo the shepards journal which is a key to find the lost city of Atlantis. Milo immediately accepts his mission to find the city, but with a little help of some crew members. They are Audrey, Mole, Packard, Dr. Sweet, Vinny, and the leader Rourke. So, they went onto a massive submarine that can help them get to Atlantis. Suddenly, they got attacked by a huge monster which is unexpectedly mechanic. It destroys the submarine and only a few people made it out alive."

Once she's done reading, she and her friends got sucked into the book.

...

They found themselves in a dark entrance and only saw a little light.

"Uh, girls. Where are we?" Cadence asked. "I think we're in some type of cave." Twilight answered. "Is it Atlantis?" Pinkie asked. "I don't think so. If we go there, that means we're going on a really long trip." said Applejack. "But how do we get there? We don't have a map or sombody from the city to lead us there!" Rainbow Dash asked. "Didn't the Book of Disney say there's a man holding a journal that can lead us to the city?" Rarity asked. "That's right. But, how do we find him?" said Fluttershy.

Then all of the sudden, four miniature submarines came out of the water. "What in the hay?!" Applejack asked. People came out of them and walked on land. "Greetings, explorers. We come in peace and we are not from this place. My friends and I just arrived here, so we suggest your guidance." Cadence explained. "Cadence, what are you doing? They won't trust us right away if you say that." said Twilight. "Yeah, they'll think we're from Atlantis." said Rainbow Dash. "Itll be okay, girls. They'll understand." said Cadence.

Milo Thatch got out of the submarine and walked towards the girls. "So, you guys are not from here, right?" he asked. "It's true, sir. We just got here." said Applejack. "I see. How did you get here anyway?" Milo asked. "We got sucked in by the Book of Disney. I know, it sounds weird." said Pinkie. "No, it sounds pretty interesting. Say, who are you?" said Milo.

"I'm Twilight Sparkle and these are my friends. Pinkie Pie, Applejack, Rarity, Fluttershy, and Rainbow Dash. This is Princess Cadence, my sister in law." Twilight introduced. "Nice to meet you all. My name is Milo Thatch and I'm here with my crew to find the lost city of Atlantis." said Milo. "Hey, Thatch! Did you find any info about these things and Atlantis?!" Rourke shouted as he and the rest of the crew came out of the boat. "Sorry, sir. They're not from Atlantis. They're like us." Milo explained. "I see. Well, it's nice to meet you lovely ladies." said Rourke. "It's nice to meet you, uh." said Cadence as she stutters to know his name. "Rourke. Lyle Rouke, I am the general of this mission and it would be pleasing if you all could join us." Rourke introduced as he shakes her hoof.

"That would be wonderful. I'm pretty curious on what the city looks like." said Cadence. "We all are, and I'm glad you're coming with us. I'm sure you'll help us out." said Milo.

The mane six and Cadence nodded in agreement.

...

So, they began their journey to Atlantis by digging through holes, using Milo's journal as a map, blowing things up, and keeps going nonstop.

"How much longer are we gonna get there?" Rainbow Dash asked. "Well, according to this journal. It says that once we got to a huge light up above, we'll know that we're close by." Milo explained as he shows the girls the journal. "That is so cool!" said Pinkie. "That journal explains everything about Atlantis. But, I wonder what that is. Must be very important." said Applejack as she touches the page where theres a huge blue diamond that lights up. "Oh, that's called The Heart of Atlantis. It's kinda like an energy source to them. We better check that out when we get there." said Milo.

"Hey, guys. I think we're here." said Fluttershy as she got off the car and looks at the light. "This is it. It's gotta be." said Milo as she looks at the journal, then the light. Everyone stops to see it. "Alright, well set camp here." said Rourke. "At least we're close at Atlantis." said Rarity. "Oh, I can hardly wait. I have a feeling that Atlantis is going to be a very beautiful place." said Cadence. "Well, wait for tomorrow. We have a long day ahead of us." said Helga. "Who was that?" Cadence asked. "That's Helga. She can be rough at times." said Milo.

Later on, the mane six and the rest are having dinner which tastes terrible. So, they put it on the fireplace. After that, they built their tents and got ready for bed. "At least we have really comfortable beds." said Rarity. "I agree, Rarity." said Fluttershy. "Just you wait, girls. Once we open our eyes first thing in the morning, we will see a very beautiful light and a whole new world." said Cadence. "I get it, Cadence. You said that like a million times. Didn't know you're that anxious to know what Atlantis is like." said Rainbow Dash. "Can we please get some sleep? I'm really tired and I can't be crabby tomorrow." said Applejack.

"Let's go to bed, girls." said Twilight as she uses her magic to turn off the light.

...

Later on that night, there were natives with huge masks on their heads to explore the campsite. One of them snuck into Milo's tent and got into his stuff. Pinkie woke up to the sound and turns on her flashlight.

The person in the mask looked at her funny and then ran off when Milo was up as well. After that, Pinkie shook her head like what just happened. While Milo was going to the bathroom, he was surrounded by fireflies. Not just any fireflies, whatever they touch catches on fire. "Fire! Fire!" Milo shouted as he ran towards his campsite. The mane six woke up immediately and was curious on what's going on. "Ugh, it's not even seven am." Rainbow Dash complained. "What does he mean by fire?" Fluttershy asked as she looked outside. What she saw was the campsite on fire. "Holy Celestia! Let's get outta here!" Cadence shouted. Everyone ran for their lives, away from the campsite. "Everyone, get to your vans! Quickly!" Rourke shouted.

The vans drive really fast, too fast to be persist. And they all crashed suddenly, completely pitch black. The mane six and Cadence made it okay, but Milo was missing. "Is everyone alright?" Twilight asked. "I think so. But, I can't believe that the fireflies catch everything they touch on fire." said Fluttershy. "At least we all survived. And nobody's dead." said Rourke as he lights up the cave they crashed into. But, it wasn't a cave. It was a volcano. Applejack begins to sniff the air and said, "Guys. I think we're inside the volcano." "How'd you guess?" Mole asked. "I can smell it. Very smokey." Applejack explained.

Mole picks up a rock and tastes it. "She's right. We are in a volcano." he said. "Look on the bright side, we didn't get burned alive." said Rarity. "Good thing. Hey, where's Milo?" Pinkie asked as she looked everywhere for him. Everyone realized that he had gone missing, so was Cadence. "Not only Milo is missing, but Cadence too." said Twilight.

"Then, we have to find them! I hope they're not dead." said Rainbow Dash.

...

Cadence and Milo were both unconcious when the natives with huge masks surrounded them.

Cadence was the first to wake up and was startled. "Who are you?! What do you want?!" she shouted in fear. Milo woke up from her yelling and asked in a weak voice, "Cadence? What's going on?" He was in fear as well when he saw the natives. When he backed him, he held his pretty bad cut on his shoulder. "Milo, are you alright?" Cadence asked. "I'm fine. Just a scratch." Milo muttered as he still held onto his wound. One of the natives realized he's hurt and took off her mask. She was a beautiful white haired woman with paint marks on her body. Cadence and Milo stared at her. She looked at his wound, puts her crystal necklace near it, and then presses her hand into it. It did hurt at first, but felt better after a few seconds. Then, Milo's wound was gone. Cadence was amazed at the crystal's power. "How did you do that?" she asked. The girl didn't answer, she puts her mask back on and left.

"Hey, wait! WHO ARE YOU?!" Milo shouted as he and Cadence began to follow her and her crew. It lead them to a beautiful landscape. Meanwhile, everyone else found them safe and sound. "Cadence, Milo. You're both safe! I was so worried about you!" Twilight shouted as she hugged her sister in law. "Holy Celestia. How did you manage to find this place?" Applejack asked. They realized what she meant and immediately fell in love with the landscape. "It's beautiful. Well done, Milo and Cadence. You found what we're looking for." said Rourke. "Thanks." said Cadence.

But all of the sudden, the natives Milo and Cadence encountered appeared from behind and aimed their spears at them. The mane six screamed. "It's okay, girls. Calm down. These natives are nice." said Cadence. "Since when are they nice? They have spears in our faces." Rarity asked. "Don't say a word, girls. Just stay quiet." said Fluttershy as she hides behind Milo. The girl native who recently healed Milo began talking to him. "Uh, Milo. I think that one is trying to talk to you." said Rainbow Dash as she points at the native talking. Milo understood her language and talked to her in that same language. The girl native was impressed and reveals herself to be Princess Kida. "Oh wow, she's pretty. Love the hair." Rarity muttered.

Milo and Kida began talking in many different languages. "Wow, how does she manage to know all of these languages?" Twilight asked. "She knows my language!" Mole shouted. "Can she speak English?" Fluttershy asked. "Of course I can. Why wouldn't I?" Kida asked. Pinkie gasped really loud and said, "She does speak English!" "We come in peace." said Rourke. "Welcome to the city of Atlantis!" said Kida. The mane six gasped in surprise. "I can't believe it. We're finally here!" Rainbow Dash shouted. "It's incredible." said Cadence. "This is gonna be interesting once we explore this place." said Applejack.

"Come, we must speak to my father now." said Kida as she leads the crew into the city.

...

As Kida leads the mane six and the crew into the city, they were amazed on how beautiful Atlantis is. Then, she leads them to see her father, King Nedakh.

Kida went to her father and spoke to him in Atlantian about the crew. King Nedakh denies about them being in the city and wants them to leave. Cadence uses her magic to understand the language and begins to talk to the king. "Greetings, your highness. I am Princess Cadence, my friends and I are here to help your people." she said. "I disagree on this. You are here for nothing. I suggest you must leave here at once." said Nedakh in a cold voice. "Don't worry, we'll stay for one night. Deal?" said Rourke as he nudges Cadence out of the way. Nedakh sighs and said, "One night. That is all." "Boy, he's harsh." Rainbow Dash muttered. "Well, that sure is a nice talk. Thank you for your time, your highness. I guess we better pack up for the night." said Twilight nervously.

After everyone left the throne room, Rourke has been getting ideas that King Nedakh is hiding something. "That King is hiding something and I want to know what. Probably some treasure." he said. "I don't think so, Rourke. He's just protecting his people like any King would." said Cadence. "But, he doesn't want anyone to help his people. I'm sure they need help from whatever happened to this place." said Rarity. "I agree. Don't you think we should talk to the princess or something?" Milo asked. That's when Rourke got an idea. "Yeah. Thatch, I want you and your pony friends to talk to the princess. So, that way we can figure out about this place." he said. "Great. I'll be waiting right here for her. Right, girls?" Milo asked. "Right." the mane six said in a nervous way.

They got a bad feeling about this.

...

They saw Kida leave her father's throne room to go somewhere.

Applejack gulped and said, "I hope she won't mind us asking questions. About the city and all of that." "Rourke would be proud. And why do I have this feeling that he's up to something?" Rainbow Dash asked. "Yeah, I think of the same thing too. His smile's not right, that's what it is. He has a villains smile." said Pinkie. "No, he doesn't." said Milo. "Trust me. He does." said Pinkie. "Uh, guys. How about more focusing on asking Kida questions than arguing about Rourke's smile?" Twilight shouted. "Oh, right." said Pinkie.

Then suddenly, Kida appeared from behind them. The mane six, Cadence, and Milo screamed at her. "What is it with you scaring us?" Rainbow Dash shouted. "I have some questions for you and you are leaving this city until they are answered." said Kida. "Hey, I was going to say that." said Milo. "Shh, come with me. All of you." said Kida as she leads them all to a pretty nice place. "Ok, I'm pretty sure you know why we're here." Twilight asked. "Yes. You're here to help us, right." said Kida. "That's right, princess. Wow, you know things very well." said Twilight. "Can you read our minds?" Pinkie asked. "No." said Kida.

"So, do you know what happened to Atlantis? I mean, how did it sink into the ocean?" Milo asked. "Yes, I do. It is said that the gods became jealous of Atlantis and wants the city to be destroyed. Thousands of people were shouting and running. Then, there was a bright blue light in the sky. A star. My father says it called my mother to it. I never saw her again." Kida explained. "I'm sorry. But, wait. You said you were here when it happened." said Milo. "Yes. It happened a thousand years ago." said Kida. "That means you're like a thousand years old." said Twilight. "I'm eight thousand years old." Kida answered. Everyone had their jaws dropped. "Eight thousand years old?! How in tarnation did you manage to live that long?" Applejack asked. "My people can live up to be thousands of years old. All thanks to our crystal which helps us survive." said Kida. "Wow." said Applejack.

"That's unique. So, can you tell us more about the crystal?" Cadence asked. "Hang on a sec. I think it's in this book right here. The Heart of Atlantis." said Milo. "You can read that? The book? It has the Atlantean language?" Kida asked as she looks at the book. "Yes, I can. I can speak and read Atlantean." Milo explained. "How is this possible?" Kida asked. "Well, I studied the city before I got here." said Milo. "Hmm, interesting. I can tell you girls are curious about the crystal." said Kida.

"Well, yeah. Did you say that the crystal helps your people survive?" Applejack asked. "That's right. You used the crystal that's on your neck to heal Milo when he got hurt." Cadence explained. "It's true. The crystal is very important to the city of Atlantis. It gives us light, heals people, and use it for energy. Like with this." said Kida as she shows them her Ketak. "What is that? It looks awesome." Rainbow Dash asked. "That is a Ketak. I put my crystal in it and it flies." Kida explained. "Cool. Can you demonstrate it to us?" Cadence asked. "Of course." said Kida as she uses her crystal sound her neck and puts it inside the Ketak which it turns on. But, it went flying everywhere and crashed. "Didn't see that coming." said Rainbow Dash.

After that, Kida leads them to a tall pole where they climbed on. "We didn't introduce to each other when I first met you. My names Milo." Milo introduced. "My names Kidagakash." Kida introduced. "What?" Twilight asked. Milo didn't get it either and asked, "Do you have a nickname?" "Kida." she said. "I can take it." said Milo. When they reached the top, it was a perfect view of Atlantis. "Whoa, it looks so beautiful from this view." said Rainbow Dash. "I'll say. I can see everything." said Applejack.

"I'm glad you all enjoyed my city. But, it's dying slowly. I need to talk to you about it so we can be saved." said Kida.

...

Later on that night, Milo is looking at the markings that deals with the Heart of Atlantis. The mane six and Cadence are trying to find information about it as well.

"I'm surprised you don't know where the Heart of Atlantis is. It's got to be in the journal." said Rarity. "I tried to find it, but it's missing." said Milo. "How'd you lose one page? Did somebody rip it off or something?" Pinkie asked. "Who knows. What's important now is find information about it, but it's not enough." said Milo. "Is there information in the water? Because I can see a lot of ancient stuff down there." said Twilight. "Really? Cool. Maybe if all of us can go underwater and find the location of the Heart of Atlantis. It's simple." said Rainbow Dash. "Are you sure it'll work?" Kida asked. "Calm down, Kida. We're just trying to save your city." said Rainbow Dash. "My city is not in danger, but the culture is." said Kida. "Well, if we want to save the city, we have to go underwater." said Rainbow Dash as she jumps into the water.

"Ya know. I kinda agree with her on this one." said Applejack as she jumps into the water with her. "Let's jump on in!" Pinkie shouted as she goes into the water. "Here goes nothing." said Fluttershy as she jumps in. "I better dry quickly after this research." said Rarity. "I guess I was right about going underneath the water." said Twilight. Kida joined in as well since she wants to help her people. "What are you guys doing?" Milo asked. "Finding information about the Heart of Atlantis." Twilight explained. "By swimming?" Milo asked. "Come on, Milo. It's not that bad. Just jump in with us." said Cadence as she got into the water with them.

Milo sighed and took off his clothes except for his underwear to get into the water. "Ready when you are." said Kida. They all dived into the water and began exploring. Twilight, Rarity, Cadence, and Kida made light so they can see. What they saw was the portrait of the Heart of Atlantis and how it works. They were amazed at it and realized why it's so important to the city.

When they got out of the water, they have a lot to talk about. "I get it now." said Cadence. "What?" Kida asked. "The Heart of Atlantis is important for your crystals. It wasn't just a star. It was a crystal, just like yours. But bigger and more powerful. Your city needs its energy to survive." said Cadence. "Yeah, the problem is that we couldn't find its location. We still need to find it so it can protect the city forever." said Rainbow Dash. "It's probably secret." said Fluttershy. "Maybe the king knows where it is." said Pinkie.

"Y'all had a nice swim?" Rourke said unexpectedly.

...

The mane six, Cadence, Milo, and Kida were in shock on what's going on. Rourke and his minions were aiming their guns at them.

"Rourke, what's going on?" Milo asked. "Why are you trying to kill us?" Twilight asked. "I'm not trying to kill you. I'm just proud at the fact you're looking for the city's treasure." said Rourke. "We're trying to save the city, not steal from them. You wanted the treasure so you can be rich." said Cadence. "Oh, you mean this?" Rourke asked as he showed a piece of paper that shows the Heart of Atlantis. "The Heart of Atlantis." Milo muttered. "You stole it from the journal!" Fluttershy shouted.

"Exactly. Welcome to the club, fellas." said Rourke. "We'll never join you." said Cadence. When Kida was about to get out of the water, the guards seized her and threatened to kill her. "Let her go!" Rainbow Dash shouted. "Nah, I don't think so. Besides, you're the one that brought us here. Now, show me how to get the Heart of Atlantis. Or else." said Rourke as his minions were aiming their guns at the mane six and Cadence. "Don't hurt them." Milo pleaded. "Then, tell me where can we find it!" Rourke shouted as he grabbed Milo. "Ok, fine. The Heart of Atlantis lies the eyes of our king." said Milo.

Rourke laughed evilly and said, "Well, it looks like we have to pay a visit to the king." The mane six gasped.

...

The doorway to the Kings throne was blown up by dynamite. King Nedakh saw his daughter, the mane six, and Cadence held hostage.

"Tell them to drop the weapons! Now!" Rourke shouted. King Nedakh ordered his guards to drop their weapons. "Very nice decision, your highness." said Rainbow Dash sarcastically. "Search the area!" Rourke shouted. "I won't let you do that!" Cadence shouted as she broke free and attacked the guards. Rourke has a taser gun and shot her. Cadence was shocked and fell from the air. Twilight screamed in horror and shouted, "Cadence!" She ran towards her and asked, "Are you alright?" "I'm fine. I just feel lightheaded." Cadence replied. Rarity went to them so she can heal her.

"That's a warning if any of you try to stop me." said Rourke. "I always knew you're up to no good." said King Nedakh. "Oh, you think so? Well, I know that you are hiding the Heart of Atlantis." said Rourke. "I'll never let you find it. It doesn't belong to you." said King Nedakh. In response, Rourke punched him in the chest and then he fell to the ground. "Father!" Kida shouted. "Now, let me ask you again. Where is the Heart of Atlantis? If you don't answer me, I'll shoot you. It's a simple thing, really. I'm going to count to ten. So, you better answer me quickly. One, two, nine, t." said Rourke as he realizes the entrance to the Heart of Atlantis.

"The Heart of Atlantis lies the eyes of our King. We're in." said Rourke. The minions pushed Milo, Kida, Twilight, and Cadence towards him. "You guys should come with me. So, I know that you're telling the truth." said Rourke. Once they all reached to the eye, it sunk down into their destination. And there was the Heart of Atlantis, surrounded by the tombstones of the past kings. "Jackpot!" Rourke shouted. "So, that's the Heart of Atlantis." said Cadence. "The Kings of the past." said Kida as she sheds a tear to her eye and prays for them. "Um, what's she doing?" Twilight asked. "I don't know, but she needs to snap out of it. Thatch, stop her from whatever she's doing." Rourke ordered.

Milo walked to her and tapped her shoulder. Kida stopped on what she's doing. "Sorry." she said. "We have to get it, but how?" Rourke asked himself as he kicks a little rock into the water. Suddenly, the Heart of Atlantis turns red with red highlights looking for a crystal. The highlight were touching at Kida and Cadence at the same time since they have crystals on them. Cadence has a crystal heart cutie mark, so that counts as a crystal. Both of their eyes turn bright blue and began walking towards the Heart of Atlantis. It turned back into blue.

Twilight notices this while Milo and Rourke are having a conversation. "Cadence? What are you doing?" she asked. Milo noticed it too and said, "Kida." Cadence and Kida looked at them and spoke in an Atlantean language telling them everything will be okay. "What did they say?" Rourke asked. "I don't know. I didn't catch that." Milo replied. "Cadence, come back here. You don't know what it will do to you if you go near it." Twilight pleaded. "Now, hold on sweetheart. We have to see if they can get the Heart of Atlantis for us." said Rourke. "You can't do that! That's my sister in law!" Twilight shouted.

Cadence and Kida were walking in the water to go to the Heart of Atlantis. Once they reached the center, all of the highlights aimed at their crystals and knocked them out. Then, they started to float towards it. Now, they are in the core of the crystal, it broke in half. The crystal began spinning and it didn't stop. Milo and Twilight closed their eyes due to the brightness. The spinning finally stopped and the two princesses are now fully crystal. Twilight watched in horror as her beloved sister in law became crystallized. "Cadence?" Twilight asked. "Kida?" Milo asked.

They both floated down gently and their eyes opened. Twilight gasped and shouted, "Cadence! Kida!" They didn't respond. They just kept walking. Milo was in shock as well. Rourke was about to touch Kida, but Milo stopped him. "No, don't. Don't touch her." The princesses kept walking nonstop as the tombstones fall into the water.

...

After that happened, Cadence and Kida were put in a huge metal bin separately and pulls them into the truck. Milo and Twilight tried to reach for them, but the guards told them to stand back.

"So, I guess this is it, huh. Well, you all are doing this horrible selfish thing because of one thing. Money. Oh, sure. Go ahead. You just wanted the city to die all because you're taking the princess away from us." said Milo. "Not to mention, my sister in law." said Twilight. "Come on, guys. Can you think of something else other than money? Look all around you. You're taking away what the Atlanteans really need to survive." said Applejack. Rourke had enough of their talking and said, "I don't care about your environmental messages. These two are going to the museum where they will be staying there forever. Sorry to say this, Thatch. But, your grandfather will be very disappointed." "His grandfather?" Fluttershy asked. "Yes, he and I used to be best friends until he passed away. But, he doesn't know that I like being rich." said Rourke. "You're right, he is disappointed. In you. If he were alive right now, he would be shocked that his best friend is going to destroy Atlantis by taking away their main crystal." said Twilight.

"Quiet!" Rourke shouted as Twilight backs away from him. "You need to listen to her. We didn't come here to take away what they need, we're here to help them." said Milo. "I know I'm forgetting something. I got the cargo, the crystal, the crew. Oh yeah." Rourke said as he punches Milo in the face, making the mane six gasp. "Milo!" Applejack shouted as she helps him up. "Are you okay?" Fluttershy asked. Some of Rourke's friends like Audrey, Sweet, Mole, Packard, Vinny, and Cookie went toward them and joins the team. "Oh, come on. Really?" Rourke asked. "This is wrong and you know it!" Rainbow Dash shouted.

"Well, that doesn't mean you can't stop me. Just watch and see." said Rourke as he drives all the way to the other side of the bridge with Cadence and Kida. "I won't let him take my sister in law!" Twilight shouted as she charges at him. But, she didn't know that Rourke was about to blow up the bridge with dynamite. Once it blew up, the explosion made her fall back to the city, unconcious and covered in smoke. Her friends went to her to heal her. Rarity uses her healing powers to heal Twilight. When she woke up, she started crying. "What's wrong?" Milo asked.

"I failed to protect Cadence. Now, she's crystallized and being taken away. What would Shining Armor say? He's gonna hate me." Twilight explained in tears. "Don't worry. We're gonna get her back. I promise." said Milo as he hugs her. "We need to get both Cadence and Kida back. Look what's happening to the crystals." said Pinkie as she noticed the crystals lights are fading due to the loss of power. "Oh no." said Applejack.

"Milo, girls! You might want to come up here!" Rarity shouted.

...

When they got to the throne, they saw King Nedakh dying from Rourke's beating.

"What happened?" Twilight asked. "I'm sorry. I don't understand why I can't heal him." said Rarity. "Where is my daughter?" said King Nedakh. The mane six and Milo looked at each other in worry, not to frighten the sick King. "She got crystallized along with Twilight's sister in law, Cadence." said Milo. "I've been searching for that crystal for so long. It chose my daughter like it chose her mother a thousand years ago. It's like us." said King Nedakh. "So, you're saying it's alive?" Milo asked. "Yes. It has very different emotions like a human." said King Nedakh. "Wow. No wonder why it's so important to the city." said Twilight.

"Yes, that is correct. Young man, this crystal has called to you." said King Nedakh as he takes off his crystal and gives it to Milo. "Me? Why me?" Milo asked. "You and your friends are the only ones who want to help us, not take away the Heart of Atlantis. I know you have feelings for my daughter. Save Atlantis. Save my daughter." said King Nedakh as slowly passes away. The mane six and Milo mourn for his passing.

...

Now, Twilight is more determined to save Cadence and Kida. She went back to the city with her friends to help her save the princesses.

"Guys. We're going after Rourke. He can't get away with this." she said angrily. "I agree. Atlantis is dying because of him. We just lost our King, for gosh sake." said Milo. The Atlanteans were in sadness of the news of King Nedakh's passing. "I know you're all upset about this, but we have to get the princesses back. Without them, the city will die." said Fluttershy. The Atlanteans agreed with her. "So, who's with us to save the princess and Atlantis?!" Twilight shouted. The Atlanteans shouted back at her like they're in.

So, the Atlanteans and Milo found Ketaks to fly alongside with the mane six. "Everyone's set for battle, Twilight!" Milo shouted. "Good! Alright, everyone! We're gonna rescue the princesses! We're gonna save Atlantis! And we're gonna die trying!" Twilight shouted as she leads everyone to battle to save Kida, Cadence, and the crystal. "I'm surprised the crystals still work even if the Heart of Atlantis isn't around." said Rarity. "At least they still work! Come on!" said Rainbow Dash.

They're off to stop Rourke and save the princesses and Atlantis.

...

When they got there, they saw Rourke in a hot air balloon with Kida and Cadence.

"Their they are!" Milo shouted. Rourke saw them and shouted, "We got company!" He grabs his gun to shoot at them. Twilight and Rarity use their magic to shoot at the minions. Lots of explosions were happening and the soldiers were falling off the balloon. Twilight lands on the balloon to confront Rourke. "Give me back my sister in law!" she said in a menacing tone. "Oh, you want her so badly? Well, why don't you join her?" Rourke asked as he shoots at her, but she dodges the bullets with her shield.

Milo saw them fighting and thinks about helping her. "Ok, Thatch. Any last words? Yes, I wish I have a better plan than this." he said to himself as he lands his Ketak on the balloon to slow down. Then, he jumps down to help Twilight. "Milo, what are you doing?" she asked. "Helping you." said Milo. "Good, now let's start him off with this." said Twilight as she zaps Rourke in the chest, but he grabs her and drags her down. She was hanging onto the bin where Cadence is being held captive. Rourke was above her and was about to kill her with an axe, but misses. Her friends watched her and Pinkie shouted, "Twilight, be careful!"

"Get Cadence and Kida out of here!" Twilight ordered. "Right you are, sugarcube!" Applejack shouted as she and Rarity broke the chains and took the bins with them. "No!" Rourke shouted. "Looks like you won't be taking them to the museum after all." said Twilight. Rourke was furious at her, so furious that he strangled her. "Tired, Miss Sparkle? I'm just getting warmed up!" he said as he raises his axe to kill her. Twilight uses her magic by casting a spell on him. She zaps her arm and it turns blue. Rourke shouts in pain and let's go of her. Then, he immediately became crystallized. "Thank Celestia." she muttered. But, the battles not over yet. Rourke became a monster and Twilight dodges the attack. He was destroyed when he became too close to the fans. Twilight got Milo while the whole balloon exploded.

"Wow, I can't believe you did that. How did you manage to turn Rourke into crystal?" Milo asked. "I don't know. But what's important now is get Cadence and Kida back to Atlantis." said Twilight.

...

When they got back to the city, they placed the bins of Kida and Cadence at the center. The bins were open automatically and everything begins to glow.

"Cadence?" Twilight asked. "I don't think it's done yet." said Milo. "What do you mean?" Fluttershy asked. Suddenly, a volcano has erupted and lava his coming very fast. Cadence and Kida were high in the air and the tombstones rised up to surround the crystal. It summoned statue guards to protect the city. They clapped their hands once to create a huge shield. Once the lava hits, it immediately turned solid rock. Then, the rock begins to crack. Twilight helps the crystal by breaking the entire thing. Atlantis is now safe from the volcano and anything that endangers it.

Now that the disaster part is over, the crystal releases Cadence and Kida back to the surface. They slowly flowed down while Twilight and Milo reach out to catch them. Kida is now in Milo's arms while Cadence is right next to Twilight. Cadence began to wake up and saw her little sister in law next to her. "Twilight?" she asked in a weak voice. "Cadence! You're back!" Twilight shouted as she hugs her. Kida woke up a few minutes later. "Milo?" she asked as she realizes she has a little bracelet she lost the same time she lost her mother. She immediately hugged Milo and then he hugged her back.

The girls went to them to see if they're alright. "Cadence, are you okay?" Applejack asked. "Yes, but what happened?" Cadence asked. "You saved Atlantis. You became crystal and then we saved you." Twilight explained. "Rourke was about to take you and Kida away from us. And then, there was lava everywhere and you saved us just like that." said Pinkie. "Strangely enough, I turned Rourke into crystal." said Twilight. Cadence and Kida looked at her in shock. "How did you do it?" Kida asked. "I don't know." said Twilight.

"Look at the city. It's even more beautiful than I imagined." said Rarity. Kida looked at the view and was happy at the fact her city is saved by the mane six and the crystal. "You saved the city." she said. "No, you and Cadence did." said Twilight. Cadence smiled at her. "Now, Atlantis will be safe from now on." said Applejack.

"Well, girls. Looks like our work here is done." said Twilight. "Where are you going?" Milo asked. "We have other adventures to go to. But don't worry, we might come back." said Rainbow Dash. "Thank you so much for what you've done to Atlantis. We will miss you very much. Here, I want you to have these. As a reminder of us." said Kida as she gives each of the mane six a crystal necklace.

"Bye, Milo. Bye, Kida." said the mane six and Kida as they disappeared. "Bye, girls." said Milo and Kida as they held hands.

...

When they got back to Equestria, they were happy about the crystals they just got.

"This is incredible. I can't believe I saved Atlantis." said Cadence. "Well, I'm glad you had fun with us at the Book of Disney." said Twilight.

Meanwhile, the Cutie Mark Crusaders were eavesdropping on them to see what the Book of Disney looks like.

...

Later on that night, Cadence joined Twilight to write her lesson at the Disney Journal. Twilight wrote,

"What I learned today is about protect those in need. My sister in law Cadence protected the lost city of Atlantis by becoming crystal. Atlantis needed protection and it already did thanks to the Heart of Atlantis."