A thousand years ago, Celestia was challenged by an ancient entity for the fate of her domain. She won, but at a terrible cost. Now, the Game begins again...
Starswirl the Bearded is not used to dealing with fans, not surprising since he never had one before. But when a certain purple unicorn of the distant future discovers time traveling, Starswirl soon finds his comfortable days coming to an abrupt end.
Captain Rainbow Dash must seize the fabled Dead Stallion's Chest or else be sent to Spike Jones' Locker. Meanwhile, Shining Armor must find Rainbow Dash or else he and Cadence will be hung.