While working on the Palais des Papes workers discover a 14th century secret chamber. Inside is a woman's skeleton. The autopsy shows that the victim is a childhood friend of the investigator handling the case. A second body is soon found.

Meurtres à avignon

In a little country village, a famous writer dies in a car accident. Inspector Gaby Molina, convinced it was murder, takes over the investigation but has to work with Lieutenant Céline Richer, newly arrived from Paris, as her partner. A team as atypical as it is explosive, but particularly effective.