In the grim, rain-slicked streets of post-war Japan, ex-cop and private dick Shugo Takashiro hunts for both a brutal serial killer and his lost lover, Kazuna. His investigation is a desperate plunge into the city's depraved underbelly, where every clue is paid for in flesh. Shugo fucks his way through the case, his hard cock finding solace and information inside the wet, willing cunts of vulnerable women. His most intense encounters are with the enigmatic nun, Kozuki, a woman tied to the very heart of the 'Cartagra' disease. He takes her brutally on the cold floor of her church, pounding his cock deep into her tight, holy pussy as she screams in a mixture of pain and ecstatic pleasure. He fills her with his hot cum, a profane baptism in a world devoid of saints. Each sexual conquest, from rough oral sex with informants to fucking sluts against alley walls, pushes him closer to a horrifying truth where love, murder, and raw, carnal lust are indistinguishable.