Two changeling royals in rivalry impersonate the Canterlot couple, completely unaware that they both have had the same idea. As time passes, memories unwillingly resurface of their adolescence while Cadance and Shining must try to escape.
Twilight assumes that her life is all she's ever known, but what if it's just one of many? What if everything—her personality, her world, her identity—was nothing more than a fantasy?