Special investigator Rika Tsubaki receives orders to raid a slave trafficking organization's hideout. To seduce a high-ranking member and extract information, she performs a skillful act during a drinking session. She then begins her infiltration mission, but gets caught in a gunfight and collapses unconscious after falling into a poisonous gas trap. Bound tightly with rope while unconscious, she is overwhelmed by pleasure. Stripped of her pride and enduring deep humiliation, she withstands endless, relentless stimulation. Several days later, she seizes an opportunity to escape, only to face a new crisis. The unfolding events push her body and mind to the limits of extreme torment.