A man comes to Equestria. It's nice. Rainbow Dash becomes his friend, but something's bothering her...

He seems to be hiding something. He's told her a lot of things, things he hasn't talked about to anypony else, but there's still something eating at him. So, she psyches herself up for a visit to get to the bottom of it.

Several weeks after recovering her crown from Sunset Shimmer, Twilight Sparkle discovers she can communicate with her counterpart from the other world, who has finally arrived at Canterlot High. When Celestia theorizes that the portal can be re-opened, Twilight and her friends--as well as the OTHER Twilight and HER friends--decide to trade places, so they can learn more about each others' worlds. The only catch: neither party can return to their own world for a full thirty moons...

This story is now cancelled. Its concepts will (eventually) be retooled into (Mis)taken Identity.