A princess and her nine companions are picked off one-by-one after stumbling into the hunting grounds of an ancient evil, in a mysterious forest of monsters.
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.
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.
Her life having spiraled out of control towards rock bottom, a down-and-out Lightning Dust seeks the help of the only pony in Equestria who may be willing to help her.
In the midst of a tumultuous conflict in Equestria, two soldiers, an eager-hearted pegasus and a formerly-demoted unicorn, embark on a mission to save the lives of a good few thousand ponies, and possibly even Equestria itself.