In this sci-fi reimagining of My Little Pony: Friendship Is Magic, Rarity has been missing since the end of the protracted Changeling War. The once-great Equestrian Empire lies in ruins. Princess Celestia is dead, a casualty of the war, and Rainbow Dash, a decorated war heroine, wastes away in self-imposed exile. Spike and the now-grown Cutie Mark Crusaders live as drifters, floating from star to star and always keeping an eye out for any clues to the white unicorn's fate. For so long they encountered only rumors, but now there's a clue—a seemingly ordinary trinket holding the potential for priceless information. Can Spike beat the odds and bring Rarity home?