Equestria: a land of magic, opportunity, and adventure. For Twilight Sparkle and her friends, adventure is in no short supply. And when a mysterious massive ship appears in the skies of Equestria, they find themselves on yet another adventure to discover its origins, and its reason for arriving in their small corner of the universe.

However, the ponies are not the only ones aware of the ship's presence. Triggered by the arrival of the craft, a long-forgotten being awakens, its last memories still fresh in its mind. And with the presence of the ship, it sees an opportunity for revenge.