In the early days of Prohibition, long before Al Capone became a household name, a German immigrant named George Remus quits practicing law and starts trafficking whiskey. Within two years he's a multi-millionaire. Pioneering prosecutor Mabel Walker Willebrandt is determined to bring him down. She dispatches her best investigator, Franklin Dodge, to look into his empire. It's a decision with deadly consequences. With the fledgling FBI on the case, Remus is quickly imprisoned for violating the Volstead Act. Her husband behind bars, Imogene begins an affair with Dodge. Together, they plot to ruin Remus, sparking a bitter feud that soon reaches the highest levels of government --- and that can only end in murder.