Kunko Mizuhara, an investigator with the National Security Investigation Agency, tracks down the mysterious disappearance of her colleagues and uncovers a grotesque human trafficking organization. Determined to infiltrate the group, Kunko is captured and subjected to an unprecedentedly brutal pleasure training. Enduring intense torture, she is relentlessly tormented until she breaks into tears. As the fierce assault continues, Kunko's body and mind are gradually overtaken, dragged deeper into a hell of pleasure.