Paul Kersey returns to New York City after being banned for a history of vigilante justice to visit his Korean War buddy Charley, who is attacked by a gang in his East New York apartment. The neighbors hear the commotion and call the police. Paul arrives and Charley collapses dead in his arms. The police mistake Paul for the murderer and arrest him. At the police station, Police Chief Richard Shriker recognizes Paul as "Mr. Vigilante". Shriker lays down the law before Paul is taken to a holding cell. In the same cell is Manny Fraker, leader of the gang who killed Charley. After a fight between Paul and him, Manny is released. The police receive daily reports about the increased rate of crime. Shriker offers a deal to Paul: he can kill all the punks he wants, as long as he informs Shriker of any gang activity he hears about so the police can get a bust and make news.