In the enigmatic city of Obsidian Valley (an artificial landmass of steam-powered technology and hidden horrors) sixteen-year-old Gin Fujita is a ghost in his own life. Shuffled between a home life of brutal abuse and a school where he is a social pariah, Gin's existence is a directionless cycle of survival.But the fragile status quo shatters when he catches the eye of Inori Chino, the Princess of Obsidian Valley. Emerging from the shadows of the elite Violet Belize dormitory, Inori claims Gin as her own, thrusting him into a hidden world of ancient lineages and supernatural violence.As Gin is forced to undergo a lethal "e;induction"e; involving high-speed chases, explosions, and tests of strength against the Princess's most loyal servants, he begins to unlock suppressed memories of a past life...one belonging to the most powerful warrior to ever walk the earth.