Agnès Le Roux, a young independent woman, returns to Nice in 1976 to have a new start in her life after a failed marriage. Her mother, Renée Le Roux, a wealthy widow, is fighting with other shareholders for control of the Palais de la Méditerranée, a casino on the French Rivera. The casino is facing difficulties and in one night, it loses five million francs to professional gamblers who very likely tampered a game.