To prepare himself for whatβs to come while in Saint-Malo, Dupin wanders through the halls of a local marketβstopping to sample its wares as he goesβwhile admiring its aromatic orchestra. But Dupinβs morning is derailed when thereβs a murder at a nearby stall. He quickly realizes this case is unlike any heβs worked on before. The police know the victim: Blanche Trouin, a grand chef of the region. They know the perpetrator: Lucille Trouin, Blancheβs sister and fellow successful chef in the area. The two had a well-known and public feud. After a bit of searching, Lucille is even in custody. The only thing theyβre missing is the motive. And Lucille refuses to talk.
Saint-Malo doesnβt want any help from the visiting commissaires. Even Dupinβs assistant, Nolwenn, is telling him to stay out of it. But Dupin, along with a few of his Breton colleagues, canβt help but begin an investigation into why a chef killed her sister in the middle of a crowded market.