Strange and dangerous happenings take place in and around Ponyville, starting with a fire in the Everfree Forest, and the return of an old enemy. But the usual team of problem solvers, the Mane 6, are no where to be found; they are on vacation, as per the orders of Celestia herself. In order to combat a new threat, a new team, headed by Princess Luna, must be found. But can there really be an Alternative Six?