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...

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.

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 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.

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?

Consultant criminalist, Astrid Nielsen, who is also autistic, helps Commander Raphaëlle Coste solve criminal investigations. With conspiracy theory followers or a Native American community, in places as varied as a monastery or a psychiatric hospital, the two women combine their talents to solve these cases. Furthermore, Astrid could well lift the veil on an already old mystery, which her father had already tried to elucidate, but without success. The series, a real audience success in France, is also broadcast in around twenty countries, in Europe, Latin America, the United States and even Japan.