Margot Bellanger, a psychocriminologist, is entrusted with the file of the sordid murder of a woman, in the Paris region. A few days later, another victim was found dead in the forest of Sénart. Like the first, her body was the object of a macabre staging.
For Margot and her team, the link between these two cases is obvious. It is indeed the same killer. And the latter would seem to be committed to making each of his assassinations a work of art.
Things get complicated when the killer contacts a journalist to send him to the location of his third composition.