When Sunset sees herself as an alicorn in a magical mirror, she goes looking for answers, eventually going through the mirror into another world. Some things are better left alone though, as she finds herself trapped in the other world as a child.
After following Sunset Shimmer through the portal and becoming stuck in the human world, Princess Celestia struggles to adapt while blocking Sunset's ambitions with her own popularity.
Ponyville, Equestria. Fallow Meadows, Indiana. Two towns torn from thier worlds and deposited together on a third. Can Human and Pony work together? They'd better hope so, because they're not alone...