Behind Kyoko's smile lurks a question: is she still committed to the mission, or already giving in to corruption? She infiltrates the luxurious neon-lit Bunny Castle as a new bunny hostess, investigating a human-trafficking operation hidden behind the upscale lounge. Unable to tell whom she can trust and surrounded by danger, the female investigator feels the rope tightening around her body turn from restraint into forbidden pleasure. As she sinks deeper into the operation, bondage and masochistic training slowly shatter her reason and drag her toward ruin.