Father Louis Desforges is found stabbed to death in a monastery. Astrid and Raphaëlle discover that the man, who lived under a false identity, bore stigmata.

A young woman under the influence of a powerful drug is found unconscious, with a weapon with her that was used to commit a crime twenty years earlier in a small Native American community from Canada. Who is this young woman and how did the weapon end up in her hands?

A murderer interned in a psychiatric hospital is found dead in his room. The first clues seem to rule out the theory of an accident. Astrid and Raphaëlle embark on a difficult investigation. They are still unaware that this murder is the work of an organized gang operating from inside the hospital.

Astrid and Raphaelle investigate a crime committed in the middle of the Gare du Nord train station in Paris. The only witness to the incident was the victim's son, Jules, a 12-year-old autistic boy.

A fashionable photographer is found dead with a stake through his heart. The two investigators are past the age of believing in vampire stories and yet the case seems to be linked to the victim's blood.

A biologist passionate about research into plant intelligence is found lifeless in a tropical greenhouse. His death immediately gave rise to the most fanciful speculations. Could the tragedy be connected to the research laboratory from which the victim had resigned abruptly a few years earlier? Astrid and Raphaëlle both lead the investigation...

Two police officers discover a homeless man dead, beaten, in the abandoned building where he lived. Astrid and Raphaëlle immediately go there. At the crime scene, Astrid notes an intriguing detail: the victim is wearing a very clean suit, without any trace of blood. This enigma is quickly resolved: another homeless man, who shared the same squat, is arrested. He admits to having put the costume on him to attract the attention of the police. According to him, three other homeless people were killed in the same way without the police launching an investigation. Astrid, like Raphaëlle, is determined to stop the killer, but she does not know how much this investigation will weigh on her emotional stability...