Nightmare Moon was supposed to be alone in her imprisonment, however there was something else on the moon, something ancient. For the next thousand years, she spent every waking moment fighting for her life until she was released from her prison. However this thing followed her, eager to continue its game and then start its conquest.

Now it is up to the Mane Six, Celestia, Luna and Nightmare Moon to stand in the way of a creature born to rule and world domination. Will they succeed, or will they bend the knee