When Pinkie Pie is playing around, having parties, she discovers a certain lake. The lake is hidden, in a strange part of town. Pinkie Pie calls for her friends and they think it's all just pinkie non-sense. Pinkie pie goes on her own and ventures down the lake. Pinkie pie is greeted by a large amount of people who are under a glass bulb. It cover's a large city, but pinkie pie soon realizes, the city is corrupted. Pinkie Pie has to take the case on her own, or maybe with her friends.