Pinkie Pie went looking for Rainbow Dash. Twilight tells Pinkie that she's at Rarity's. Pinkie Pie goes to Rarity's and finds Rainbow Dash. She tells Dash that she has something fun planned for them. Something to die for. Rainbow Dash, not knowing Pinkie's motives, arrives at Sugarcube Corner where Pinkie Pie tells her that she'll bake. After eating a pre-made cupcake, Rainbow Dash passes out. She awakes in a basement where she is strapped down on a metal slab. Pinkie Pie tells her that she'll literally be baking. After Pinkie Pie sings "I Can't Decide", written by Scissor Sisters, she goes out for a walk and captures Rarity. Pinkie Pie puts her in a pit after she cuts off her horn. Pinkie then zaps Rainbow Dash with electricity before bringing Rarity into the room to see her. Pinkie then pulls a pony out of the back room and cuts her eyes out. Afterwards, Pinkie slits the pony's throat in front of Rainbow Dash.
Meanwhile, Twilight goes to Manehattan to ask Trixie for help. Twilight and Trixie arrive back in Ponyville. When they get back they go to the Mayor's house to find that she had been brutally murdered. They get the help of Princess Celestia's Royal Guards and investigate Sugarcube Corner. They find a note left by Pinkie Pie that said she has taken Fluttershy. This is the moment Twilight decided to spring the trap. Trixie lets herself get captured and taken to Pinkie Pie's hideout where she subsequently frees herself using her new found magic. She then narrowly escapes by jumping through the living room window. After ending up in the Hoofington Hospital, Trixie has the nurse send a message to Celestia to let Twilight know that Pinkie Pie's in Hoofington. Pinkie Pie visits Trixie in the hospital and tries to kill her. Twilight goes to visit her, causing Pinkie Pie to retreat. Pinkie Pie loses it even more and decides to just kill every pony she captured. Twilight and Trixie come to the rescue and find out the origins of Pinkamena. They also figure out that Pinkie Pie has brainwashed Applebloom to think killing is fun. The Royal Guards appear and take Pinkie away. Celestia personally thanks Trixie for her help in saving Ponyville.
Later, Rainbow Dash, Rarity, and Fluttershy are visited by Twilight and Trixie in the hospital. They receive a package from Pinkie Pie with a note that said, "Dear friends, I just wanted to let you know that I'm alive and well and traveling Equestria. I'm seeing the sights. I've met some new friends and have a new home. My life is getting back to normal. Thanks. Love, Pinkamena. PS: I still throw some killer parties." After reading the letter, Twilight opens the box. Once seeing what was inside she drops it. Blood spilled out along with an eyeball.

The Story Continues...