In a world decayed by war, two mares have survived by becoming thieves for hire. After receiving a job from a revolutionary supporter, the two must travel to the dead city of Canterlot to find an artifact which may just be the key to Equestria's salvation.

When an old foe receives unlikely help he is able to accomplish the unthinkable, conquer Equestria. With a new king, and six ruthless Governors, each with a grudge against one of the wielders of the Elements of Harmony, Equestria has lost its light. After being released from a fifteen year seal, Twilight and her friends must fight to reclaim the Elements and bring light to the world they love.