Mogi Yumi is a senior investigator with the Kanto Narcotics Control Bureau. Influenced by her father, a former bureau executive, she has hated drug crime since childhood. After the Sagawa Alliance—an organization flooding the streets with illegal drugs—captures her, they inject her with a powerful aphrodisiac. The drug cruelly exposes the hardcore masochistic desires she had kept hidden, leading to a grim spectacle of helpless orgasms.