Elite investigator Riho's lover disappears while pursuing an illegal aphrodisiac ring. Believing he is alive, she traces the drug's production route and infiltrates a pharmaceutical company as a researcher. She endures humiliating blowjob service for information and finds her lover imprisoned inside, only to be captured when the trafficking gang catches her off guard. Even as the drugs make her squirt, lose herself in vacant-faced orgasms, and endure creampies, she refuses to abandon her mission—not even when she is drugged and assaulted in front of her lover.