When Discord stole the Elements of Harmony, Luna summoned the greatest warriors in the multiverse, Sector V. Only 2 problems, 1 they're now ponies, 2 Luna has no idea how to send them back.
The CMC find themselves in a world much like their own. Except that here, blank flanks, who have taken on a very familiar name, fight for what's right against the tyranny of those with Cutie Marks.