Chaos dans le vin noir

Benjamin Lebel and his assistant Mathilde go to Cahors to evaluate the wine production of the estate of Mr. Edouard Perolles.When they begin the wine tasting, they have a bad surprise: the wine is very foul.In the wine tank No 13 they find a corpse.The man has been severely hit and put in the wine tank.Nodody knows his identity.The police captain Medraoui makes a lot of questions to Mr. Perolles (about the guests who have come to the estate or about the workers of the estate).On his side Benjamin Lebel begins his own investigation.