Pinkie Pie is throwing a massive party for every pony in Ponyville and Cloudsdale to come to. Everyone's favorite background pony, Derpy Hooves, is assigned to bake her famous muffins to supply the ponies a dessert. At first, it's just a party, but the next morning, it's a blur. Twilight and the mane six set out to find what happened and how.

A "what happened last night?" story with some elements of "The Hangover" mixed in. Enjoy!