In present day Shinjuku ward, Ryo Saeba (Ryohei Suzuki) works as a "sweeper." He likes beautiful women and when he sees one, he doesn't hesitate to talk to them. Nevertheless, when he receives a request from a client to carry out a mission, he does excellent work with his elite gunman skills, physical ability, and cold attitude. After Ryo Saeba's partner Makimura is killed, he begins to work with Makimura's sister Kaori. They form a new team to uncover the truth behind his death.