National karate champion Miyuki Majima receives a mission to infiltrate the president's mansion of Fukai Industries and retrieve evidence of secret political donations from his computer. While carrying out the assignment, she is suddenly knocked unconscious with a blunt object, kidnapped, and bound to a restraint chair. Not only is she subjected to violent assault by the security guards, but also forced into blowjobs and creampie attacks, while being denied access to the toilet. Locked in a cage, she is tormented by the company president using a vibrator and electric massager, forced into humiliating squirting scenes, and made to climax repeatedly. The relentless torture and degradation form the core highlight of this intense production.