A band of misfits must come together to foil corrupt Canterlot elite, war criminals, and old enemies. Meanwhile, Princess Twilight Sparkle must divert her attention between Equestria on the brink of war and a vengeful threat beyond the sea.
Venturing to a mysterious island of monsters, mystery, devils and witchcraft, Rainbow Dash joins forces with her old enemy, Lightning Dust, to rescue their friends and save Equestria from total destruction.