When a young woman is found dead on the backseat of a car, the police officer in charge of the investigation discovers a mysterious casino chip stuck between her fingers. Intrigued by such a trail, he traces it back to a secret gambling cirlce with dubious methods. Croupiers always rip clients off from their money, whereas hostesses appease them or even drug them to achieve their ends. The cop decides to dive incognito into the dark atmosphere of this circle, to solve his case and, maybe, have a taste of the pleasure this very private club has to offer…