Installed at the blackjack table of a casino, Wenger, a player is closely monitored by the services of director Didier Cassard. Insolent luck or cheating, he accumulates the winnings without being able to pierce the secret of his game. At his side, Fabienne, an attractive player, accustomed to the place also tries to win the Jackpot. With the arrival of a new player, Anita Fargier, inspector of the Gaming Police, Wenger seems to have suddenly lost his hand.
