In a series of powerful dramas, the series begins, where Maygrit is called to investigate a murder in a small village near La Rochelle, the victim of the ancient Jin, who shot her through her window. She was a local mail mistress with access to everyone's mail and knew everyone's secrets. The main suspect is a married school, but the local doctor explains that this is mainly because he came from Paris and the village was upset by the arrivals. Chat with two school boys putting Maigret in the right direction.