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 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.

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...