Captain Hannibal Pennac is retired and dreams of reconciling with his daughter Annabelle, also a police captain, who has just been transferred to Montpellier. But Anabelle is angry with her father and does not want to talk to him, because he left her when she was 6 years old. However, a mysterious case will force them to unite and Annabelle will have no choice but to work with her father.
Luisa lives with Mathieu, the man she loves, and Arthur, Mathieu's son by his first wife, who died in an accident. But Arthur, whom Luisa has been raising like her own, suddenly disappears from school and no one claims a kidnapping.
Charlie (Guy Marchand) returns home after being declared legally dead to reclaim his wife Georgia (Caroline Cellier) and cash in on a lucrative life insurance policy in this shadowy drama. He finds Georgia is married to the crooked cop William (Niels Arestrup), who has his eye on the insurance money. Antihero Charlie and the villainous police inspector head towards an inevitable confrontation, while Georgia is caught in the middle.
Police Commissioner Jules Maigret returns to the small village where he spent his childhood at the request of the Countess of Saint-Fiacre, who has received a disturbing anonymous letter.
