After Luna's disastrous diplomatic excursion to the Griffon Empire nearly starts a war and exposes uncomfortable truths about the antiquated mare. Celestia and her royal advisor are forced to use drastic and rather fluffy measures to save Canterlot.

In the midst of a spree of vicious murders, Ponyville is gripped in terror, the Royal guard are clutching at straws. Until one day a weather pony named Rainbow Dash stumbles upon a dying creature who may hold the answers, if only she could speak them