The young farmer's son Eugène Mertens disappears after a drunken night with members of the clan de Bellicourt. As always, the dish reacts very lax. Constant Reynaert decides to investigate himself. Eugène's body is found and Constant Reynaert reports about the curious autopsy. The investigation is now being dealt with more seriously. Three men are charged with the murder of Eugène Mertens. However, they are acquitted. Constant Reynaert decides to mobilize the general public. The dish is under very heavy pressure ...