Miki Sunohara, a government agent operating as an undercover narcotics investigator for an unauthorized organization, infiltrates an enemy hideout to rescue her comrades. However, she is captured and taken hostage, becoming the target of intense interrogation and torture. Her captors subject her to a series of degrading and agonizing stimuli, including aphrodisiac drugs, electric shocks, and vibrator penetration. Despite her fierce resistance and determination to endure, the relentless assault pushes her beyond her limits. Overwhelmed, she collapses into a series of convulsive, uncontrollable orgasms. Throughout the ordeal, she is forced to confront the question: what is it exactly that she is trying to protect?