Apple Bloom, Scootaloo, and Sweetie Belle, in another crusade gone awry, find themselves brought to a world very much like their own.

Except that here, Cutie Marks are considered evil and an organization known as the Cutie Mark Crusaders, composed entirely of blank flanks, fight to end the tyranny of the marked.

Adding to the fillies confusion and culture shock, their counterparts in this backwards world are heralded as some of the best the organization has to offer and are expected to battle alongside their fellow blank flanks.

Making things worse are the enemies they're supposed to face. What the other operatives call villains, a large chunk of them they call friends.

The three fillies must now find a way to return home and keep their sanity intact as all they have believed in is put to the most bizarre and backwards test of their young lives.