Yuri Oshikawa, an active narcotics investigator, becomes entangled in a case where her comrades are disappearing one after another, fueling her growing anger and frustration. Upon learning from an informant that the Black Lion Society is involved, she infiltrates their base alone—only to fall into a carefully laid trap. Before losing consciousness, her body is completely restrained and subjected to relentless, senseless torment. Unable to endure the humiliating pleasure training, she descends into an endless hell of ecstasy. Yuri climaxes repeatedly in a state of panic. What fate awaits her?