In early-1970s Las Vegas, low-level mobster Sam "Ace" Rothstein gets tapped by his bosses to head the Tangiers Casino. At first, he's a great success in the job, but over the years, problems with his loose-cannon enforcer Nicky Santoro, his ex-hustler wife Ginger, her con-artist ex Lester Diamond and a handful of corrupt politicians put Sam in ever-increasing danger.
John Gotti, the head of a small New York mafia crew breaks a few of the old family rules. He rises to become the head of the Gambino family and the most well-known mafia boss in America. Life is good, but suspicion creeps in, and greed, rule-breaking and his high public profile all threaten to topple him.