Commander Raphaëlle Coste visits the police records bureau and meets the brilliant but unsettling young Astrid, who gives her a helping hand.

When a lawyer collapses in a courtroom, Raphaëlle and Astrid start an investigation which leads them to a house filled with supernatural phenomena.

Raphaëlle and Astrid take an interest in a former resident of the mysterious house, a woman who murdered her entire family there 24 years ago.

A Natural History Museum employee is found dead at the foot of a dinosaur skeleton. Not a drop of water on the horizon and yet, the victim drowned.

When a famous writer is found dead, the duo starts an investigation on the trail of a tragic fire that could be the source of a Machiavellian revenge.

Astrid and Raphaëlle find out that the dead body discovered after the collapse of an underground gallery is that of an 80 year-old alchemist.

After the president of an autistic association dies mysteriously, a new corpse is found. Though officially deceased days earlier, he is a suspect.

A woman is murdered, but the main suspect was in prison at the time of the events. The duo quickly realizes that it is the work of a serial killer.

A young woman is found dead in a forest. Her body is partially burned and it seems that strange rituals were performed at the crime scene. Disturbing detail: she gave birth just hours before her death and the baby's whereabouts are unknown. Astrid and Raphaëlle find themselves on the trail of a feminist association: Circé. Was this young woman killed because of her commitment? Is the murder related to an obscure practice of witchcraft or to the baby she was carrying?

At an auction, the auctioneer presents a precious ancient manuscript, the Corpus Hermeticum, before having a fit of delirium and then collapsing, dead. Apparently, he was poisoned, and in panic, the priceless book was replaced by a fake. Astrid and Raphaëlle will be interested in this object that would contain absolute knowledge and that arouses the wildest desires.

A renowned astrophysicist is found struck down even though no storm had occurred at the time of his death. Social networks take over the case and cry conspiracy when we learn that the victim was about to divulge a state secret.

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.

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...

A serial killer repatriated by plane under Raphaëlle's supervision dies during the flight, the victim of a mysterious decompression accident. Helped by Astrid on the phone, Raphaëlle finds proof that it is an assassination and that the culprit is among the passengers...