Japan has a conviction rate of 99.9% for criminal cases that go to trial. A lawyer (Hiroki Hasegawa) is able to defeat those odds and obtain an acquittal for his client, even though there's conclusive evidence that says otherwise. Sometimes, due to minor things, good and evil can switch sides and good people can become bad people.
In this sequel to Police and Prosecutor, Nakaido, the passionate gymnastic-teacher-turned-police-detective, is still eager to arrest criminals by all means and be appreciated by victims. He plunges into cases without any care for compliance issues.