The drug trafficking organization Kuroshishi-kai has been expanding in scale and becoming ever larger. Meanwhile, undercover drug investigators are disappearing one after another, and one elite investigator, Saya, is getting angry and frustrated as her colleagues get caught up in the incidents. Investigator Saya enters the hideout based on information from a colleague who has infiltrated Kuroshishi-kai, but... it was all a trap! Investigator Saya is caught in the net of a huge organization and is captured by Kuroshishi-kai.