Elite detective Ichika Hoshimiya is determined to dismantle "Gryps," a criminal organization involved in international drug trafficking. Defying orders from higher-ups and avoiding conventional aggressive tactics, she pursues the case through her own methods. Behind her actions lies a deep-seated hatred and desire for revenge—her father was murdered by the organization's leader, Tabuchi. After obtaining intel on the gang's hideout from a dealer, Ichika launches an undercover investigation. However, the information leaks, and she is captured by the organization. Bound and immobilized, she is forcibly administered drugs as a form of psychological torture. Though she resists fiercely, the overwhelming pleasure gradually erodes her mind. As her rationality crumbles, the story unfolds her inner struggle and descent.