A group of confederate prisoners escape to Canada and plan to rob the banks and set fire to the small town of Saint Albans in Vermont. To get the lie of the land, their leader spends a few days in the town and finds he is getting drawn into its life and especially into that of an attractive widow and her son.

Dave Bannion is an upright but unscrupulous cop on the trail of a vicious gang he suspects holds power over the police force. Bannion is tipped off after a colleague's suicide and his fellow officers' suspicious silence lead him to believe that they are on the gangsters' payroll. When a bomb meant for him kills his wife instead, Bannion becomes a furious force of vengeance and justice, aided along the way by the gangster's spurned girlfriend Debbie. As Bannion and Debbie fall further and further into the Gangland's insidious and brutal trap, they must use any means necessary (including murder) to get to the truth.