Deep in the oceans of Equestria lies the kingdom of Aquastria. It was once joyful, but is now full of sadness and misery. Pinkie Pie, the youngest daughter of the sea king, wonders if there might be something more in the land above.

In which Discord and Fluttershy go to the store and buy two cakes.

Discord goes to Canterlot High to find the elements of harmony and corrupt them to his own will, but then he meets Pinkie Pie and things get complicated.