Atlantic City at the dawn of Prohibition is a place where the rules don't apply. And the man who runs things -- legally and otherwise -- is the town's treasurer, Enoch "Nucky" Thompson, who is equal parts politician and gangster.

Explore five powerful New York Mafia families, who ran organized crime in America.

Set in the early 1980s when the construction of the Jacob Javitz Convention Center on the Westies' home turf in Hell's Kitchen promises a financial windfall. Despite being outnumbered fifty-to-one by the Five Families of the Italian Mafia, the Westies' legendary brutality and cunning have given them the leverage necessary to share the spoils through a fragile détente. But internal conflict between the brash younger generation and the old-school leadership threatens to set a match to this powder keg, which will sweep the Westies into the FBI's ever-deepening investigation into the Italian mafia.