Specialized units, known as the Secret Police, are deployed to infiltrate dangerous investigations and handle major cases. Mizuno Asahi, a female investigator promoted for her high crime-solving rate, is betrayed by her supervisor at a transaction and subsequently lured and imprisoned. She was initially persuaded to join a criminal organization, but Asahi resolutely refused, leading to cruel torture and humiliation, including being hung upside down and having candles dripped on her. Still unsatisfied, the men began to wantonly ravage Asahi's body, mercilessly ejaculating large amounts of semen into her already wet vagina.