In the police archives department, Commander Raphaëlle Coste meets a woman with an immense knowledge of all criminal investigations.

An employee of the Natural History Museum is found dead near a dinosaur skeleton; Raphaëlle and Astrid investigate what lies behind this bizarre crime.

A famous writer is found dead -- poisoned -- and Raphaëlle is convinced it is murder, even though the man's flat is locked from the inside; Astrid and Raphaëlle enter the world of publishing to investigate.

Three doctors have died by suicide following a certain pattern. Can Astrid, a police archivist, help solve the mystery? Commissioner Raphaëlle Coste thinks so.

Raphaëlle needs all the help Astrid can give when a renowned lawyer dies of fear in court. But when Astrid becomes overwhelmed by press attention, she must fight to keep her on the team.

Astrid and Raphaëlle have two corpses and one ghostly experience on their hands. When Astrid's nervous system overreacts in a cellar, it prompts an important breakthrough in the Karlishian case.