Princess Celestia and Princess Luna are invited to attend a concert at the Hoofington coliseum in Manehatten but their royal duties call them away so they send the next best thing Princess Twilight and one of her friends only it seems all of them are busy all except Pinkie Pie. Things are going great until Pinkie recognizes a familiar face and won't leave Twilight alone or be quiet until she meets this mysterious double-ganger.