After Twilight discovers a dusty old book detailing trans-dimensional portals used by denizens of ancient Equestria, she learns that one of these portals is right outside Ponyville. But something went wrong with the spell. Instead of a being from a different dimension, she summoned a pegasus who seems more confused by this than her. When she tries to send him back to where he came from, she gets hauled along for the ride. Turns out the portals match their users to the universe they are entering. How will Twilight handle being human?