When a group of three ponies terrorize Canterlot with evil, it is up to Applejack, Pinkie-Pie, Fluttershy, and Rainbow dash to stop them. They will soon learn that magic isn't just for unicorns, magic is held in every pony's heart.

After the events of season 3, Discord returns and shows that he is not reformed. His chaos will reign in a new way in this magical story.