To deal with the increasing violent crime rate in the Shinjuku area of Tokyo, a special investigation team is formed at the Shinjuku Police Station. Detective Shunsuke Yamashita (Hideaki Ito) and Detective Keiichi Tashiro (Kenji Sakaguchi) begin work at the special investigation team. Detective Shunsuke Yamashita does not care about details and says what he thinks. Meanwhile, Detective Keiichi Tashiro is diligent and enthusiastic with his investigative work. The two men frequently argue, but also cooperate to solve the cases.