A young woman was found dead in the backseat of a car, the inspector in charge of the case discovers a casino chip stuck between the fingers of the victim. Intrigued by this find, he goes to a closed game club with rather dubious rules. Indeed, clients always lose and are reassured by the girls present in the institution. The policeman decides to immerse himself in the special atmosphere of this game club in order to conduct an investigation, as well as enjoy the pleasures that he can offer ...