A young nurse, newly hired, commits a critical error during surgery—one that endangers the patient's life. The doctor covers it up. Learning of the incident, the shadowy enforcer known as BLACK JACK takes payment and begins punishment. The target: Shirakawa Ruri, a proud and defiant woman. What harsh discipline will she be forced to endure? How much can she withstand? Trembling with fear and rage, shedding heavy streams of shameful tears, her battle begins here.