Once a mild-mannered liberal, New York City architect Paul Kersey (Charles Bronson) snaps when intruders break into his home, murdering his wife (Hope Lange) and violently raping his daughter. A business trip to Tucson, Ariz., lands him a gift from a client, a revolver he uses to patrol the streets when he returns home. Frustrated that the police cannot find the intruders, he become a vigilante, gunning down any criminal that crosses his path. The public finds this vigilantism heroic.