Female detective Kurose infiltrates a drug trafficking organization's base in pursuit of her target: arresting Sakura, the boss responsible for her father's assassination. Thanks to Kurose's efforts, Sakura is successfully captured—but is mysteriously released shortly afterward. Sensing something is wrong, Kurose attempts to infiltrate the organization again, only to be taken hostage this time. Stripped of all resistance, she becomes a test subject for the drug ring and is subjected to brutal torture.