Recently, Richard was the owner of a cozy hotel in the French valley of Foll. After meeting Valérie d’Orse, however, they became partners in a company providing private detective and personal security services.
They help with security on the set of a historical film, which is being shot nearby at the chateau of Valance.
When, during the filming, an actor dies under strange circumstances, Valérie decides to solve the mystery with full enthusiasm. As Richard and Valérie watch the production process, they realize that the killer could be almost anyone involved in the project.