In a harsh Equestrian future under attack by strange, night monsters, a young unicorn must set out in unlikely company to reunite the Elements of Harmony, overcome treachery, and bring the magic of friendship to a world striving for light.

After a peaceful night of meteor showers, Derpy Hooves finds a strange, amnesia-ridden stallion at the edge of town. Helping him regain his identity is a quest in itself, but Derpy has no idea of the vast scale of adventures it will lead to.