Toryomon Raiden is a samurai from Akiyama, a junior investigator of the Karp-and-Dragon service. His cases involve violent deaths and resurrections. The killer sacrifices his own body to the one he has killed—this is the noble law granted by the Buddha Amida during the era of the Great Slaughter. But people wouldn’t be people if they didn’t try to turn any law inside out and adapt it to their own selfish desires. That means the young samurai’s life is also in danger.