Set in Atlantic City, New Jersey, during the Prohibition era of the 1920s, the series follows Enoch 'Nucky' Thompson, a political figure who controls the city through a complex web of corruption, bootlegging, and political maneuvering. As the undisputed boss of Atlantic City, Nucky navigates the treacherous waters of federal law enforcement, rival mobsters, and his own personal demons while attempting to maintain his grip on power during a decade of unprecedented social and economic change. The narrative expands beyond the boardwalk to include historical figures such as Arnold Rothstein, Lucky Luciano, Al Capone, and Meyer Lansky, illustrating the rise of organized crime in America. As the series progresses, the power dynamics shift, leading to violent turf wars and the erosion of Nucky's influence, ultimately exploring the high cost of ambition and the inevitable decline of the criminal empires built on the foundation of the Volstead Act.