On the night of Radian and Adagio's return home from their visit to Equestria, Princess Twilight Sparkle seeks out some clarity of the events that transpired before by way of the injured Sunset Shimmer.

A scientifically brilliant but antisocial former student of Canterlot High seeks out Adagio Dazzle, now alone and down on life. He promises to restore her powers in return for help with a massive scientific breakthrough.