In the human world, a tragedy left an entire bus worth of children dead, their families and friends to mourn the lost. In Equestria, those same children found themselves in another world with new bodies, having to cope with being on their own, their memories, and their own deaths.
Ten years later, they begin to reunite in Ponyville after some of them assist in defeating Nightmare Moon.
Now Twilight Sparkle and her friends must try to cope with a strange and diverse group of beings, with personalities as varied as their species, moving in and around her new home. And not all of them see their world as a kind and wonderful place. Some of them are just too Cynical for that now.
Many OCs interacting with many canon characters.
NOTE: Not sure if I need human tag or not but putting it just in case.