What would you do, if you met a pony who was at once your brother, and yet not? Applebuck braves the dimensional divide to reach his goal. But how will he deal with a world in which everything is flipped? His friends, his family, and even... himself?

Twilight and her friends are transported during a botched spell, across dimensions to... Ponyville, Equestria? But not the same one. In a library across town, six stallions join their forces as they try uncover the appearance of their filly look-alikes!