After a concert, the president of the association is found dead behind the cloakroom. A stained coat appears in the bag of a young volunteer. For Roxane Derval, however, one detail resists this too simple story: no one has distributed the ticket supposed to designate the garment.
The president of a pastry contest is found dead behind the stage. His voice echoed a few minutes earlier. Between a confiscated recipe and a sugar aviary, Inès Garrigue looks for what the witnesses have actually seen.
A stolen painting reappears in front of the museum. For Iris, its return should close the case. But a detail on the back reveals a disappearance no one had reported.