However, Sunset Shimmer a renegade former student of Princess Celestia, steals her magic crown and escapes to another world. Twilight is charged with recovering the crown and she and her companion ...

So Fluttershy, Pinkie Pie, Rainbow Dash, Rarity, Applejack, and Sunset Shimmer must work together to win the cup. But they find out that the other Twilight Sparkle is on the opposing team.