"Ghost" is the largest drug trafficking organization in Japan.The whole picture is wrapped in a veil and never reveals its tail.Frustrated, the Central Criminal Investigation Bureau is trying to make a breakthrough by requesting the Kunoichi secret organization "Tsukurei" to conduct an illegal undercover intelligence investigation as a top-secret operation.And Rei, a member of Tsukurei, was sent to Ghost's affiliated trading company "Crystal Arm" as Shiori Inami.