Young Treasury Agent Elliot Ness arrives in Chicago and is deternimed to take down Al Capone but it's not going to be easy, because Capone has the police in his pocket. Ness meets Jimmy Malone a veteran patrolman and probably the most honorable one in the force. He asks Malone to help him get Capone but Malone warns him that if he goes after Capone, he is going to war.
During Prohibition, Treasury agent Eliot Ness sets out to stop ruthless Chicago gangster Al Capone, and assembles a small, incorruptible team to help him.