Sunset, Twilight, Henry and Spike were in a carriage that is being pulled by two anthro royal guard ponies, they are on the way to a town called Ponyville to check the preparations for the Summer Sun Celebration.

"Cheer up you two, at least we can make some friends." Spike said.

The carriage soon landed in Ponyville, the group got off and thank the guards as they left. Henry was feeling a bit scared seeing a lot of anthro ponies passing by until Sunset told him that she'll cast an invisibility spell on him, Sunset lit up her horn and Henry is now invisible. They all went to check the preparations for the celebration, the first is the food. They went to a place called Sweet Apple Acres located outside Ponyville, the trio were greeted by a friendly anthro pony mare name Applejack.

Applejack introduced them to her entire Apple Family, then they tasted the food but found out it was too much. Soon they left Sweet Apple Acres to check on the weather, then they met Rainbow Dash who is an anthro pegasus mare also in charge on clearing the clouds in the sky. Next they check the decorations at the Town Hall and they met a beautiful unicorn mare name Rarity, she is a fashion designer who owned a boutique in Ponyville. Finally they cjeck the last part of the preparation, music.

They soon meet Fluttershy who is a shy anthro pegasus mare, the group arrived at the Golden Oaks Library and went inside.

"Um, where are the lights ?" Henry ask until the lights turned on to reveal the residents of Ponyville which shocked the group.

"SURPRISE!" They screamed until a pink mare came and introduced herself as Pinkie Pie, Ponyville's best party planner. The two unicorns sigh and decided to drink some lemonade, but they accidentally drank hot sauce by mistake and they went upstairs. Henry followed them to the library's bedroom and just in time as the spell soon wore off, the boy sat on the bed with Sunset and Twilight.

The bedroom door opened to reveal Spile who has a lamp cover on his head and covered in streamers, "Girls, Pinkie started playing pinning tail on the pony! Do you wanna play ?" He ask.

"No! All the ponies in this town are crazy! Do you know what time it is ?" Twilight ask.

"It's the eve of the Summer Sun Celebration, everypony has to stay up or they'll miss the princess raise the sun. You really should lighten up girls, it's a party." Spike answered until he left.

Henry look outside the window and saw something.

"Girls look!" The boy called out as the two unicorns saw the moon with the mare's face engraved in it, there are also some sparkling stars surrounding the moon.

"Hope the princess was right, maybe it was an old pony tale." Twilight said until Spile came back and told the trio that it's time to watch the sunrise, they all went straight to Town Hall and saw everypony has gathered.

The crowd didn't see Henry because they were all excited to see their princess, they waited until it started. Mayor Mare then announced their princess, Princess Celestia but as the spotlight turned on towards the spot to where the princess was supposed to be but she's not there. Everypony went silent as Rarity check until she came back and said she's gone. They gasp until dark blue mist appeared and took form of an anthro alicorn with jet black skin, blue armor and her eyes are dark blue with a dagger shaped pupil.

"Nightmare Moon." Twilight whispered.

"Oh my beloved subjects, it's been so long since I've seen your precious little sun-loving faces." Nightmare Moon said.

"What have you done with our princess ?!" Rainbow Dash ask and was about to attck Nightmare but Applejack hold her back.

"Why, am I not royal enough for you ? But do you know who I am ?" Nightmare ask in a scary tone. No one answered.

"Does my crown no longer count now that I have been imprisoned for a thousand years ? Did you not recall the legend, did you not see the signs ?" She ask.

"We do." Came the voice of Twilight and Sunset.

Everypony then look at the two ponies.

"And we know who you are, you are the mare in the moon. Nightmare Moon." They both said together as the crowd gasp.

Nightmare was impressed, "Well well well, it appears two ponies remembers me. Then you two also know why I'm here." Nightmre said while glaring at the two unicorns who were silent.

"I do." Came Henry's voice as he walked towards the two unicorns, the crowd gasp in shock by his appearance. "Because you're here to bring about all of Equestria in eternal night and make sure it stays night time forever." He answered.

Nightmare laugh as she soon teleported in front of the boy, "Very good little colt or should I say Henry." She said as both Twilight and Sunset were shocked while Henry looked stunned.

"H-how do you know my name ?" He ask as Nightmare gotten close to his face.

"I know is because I over heard my good self contacted you through your mind and gave that potion to revive you with a new soul, well then let's see how ypu can become like me." Nightmare said as her horn glow and a potion bottle filled with dark blue liquid appeared, then she grabbed Henry and opened his mouth until she poured the potion into his throat.

She soon let go of the boy as he coughed repeatedly, "What did *cough* you do to *cough* me ?" Henry ask while coughing.

Nightmare laugh again, "I made you drink that potion so that you can be transformed just like me." She answered before she turned back into her mist form disappeared through the door.

"Come back here!" Rainbow screamed as she went through the door but Nightmare already disappeared.

"Night time, forever ?" She ask until she looked down and saw Twilight and Sunset carrying Spike along with Henry.