Mizuki Yayoi plays a female investigator who, betrayed by her ally, is attacked by members of a rival organization. She suffers throat torture, sawhorse punishment, kidnapping, and confinement, gradually being driven to psychological breaking point. As her mind is slowly shattered, she is ultimately brainwashed into performing lewd sex acts in front of her former boss. Showcasing a uniquely different charm from Mizuki, this is the masterpiece of the "Brainwashed" series, delivering intense BDSM, sweating, spy themes, tight bondage, kidnapping, confinement, and cum swallowing throughout.