The CMC managed to break into Discord's home out of curiosity, but got a bit distracted and accidentally broke the world. Ponies are being teleported anywhere and everywhere, across all sorts of random dimensions and genres. Spitfire finds herself in a secret order, Applejack is hiding from strange supernatural creatures, Chrysalis is hunting Kira, and Cranky Doodle Donkey is on a pirate ship!

Every Pony in Equestria has found themselves in a strange and new places, and it's up to the CMC and Discord to find them all and bring them back home. A massive crossover where ponies are stuck trying to find their way home from various worlds.