René Calignani, boss of a small transport company, has been assassinated. Judge Nadia Lintz is handling the case. She goes to the company premises and tries to get the employees to talk. Laetitia, the victim's daughter, sees this as unjustified harassment and complains about the magistrate's methods. Nadia Lintz, for her part, is convinced that cigarette trafficking between France and Belgium could explain the crime. A certain Antoine is one of his suspects. He would have wanted to eliminate Calignani to silence him. Not everyone shares the judge's opinion. She must support her hypotheses with evidence which, for the moment, she lacks...

A couple and their 15-year-old daughter are killed in their suburban home. The three victims were executed with knives and a strange cabalistic sign was painted on the living room wall with their blood. Romain, the eldest son, who was out that evening, escaped the massacre and discovered the tragedy the next day. Nadia and Rovère think of a ritual crime like those previously committed in England. After turning to an anthropology professor specializing in occult and transgressive rites, suspicion falls on a group of students, fans of black masses and neo-Nazi rock. Nadia and Rovère will clash violently, especially since a Scotland Yard cop, working on the two crimes and called by Jagot as reinforcement, will sow discord between the judge and the non-conformist police officer.

Pascal Jagot receives an anonymous email and tasks Nadia with reopening a file closed four years earlier. This was an accident involving a hit-and-run which did not give rise to any judicial investigation. Nadia exhumes the body of the victim, Nathalie, and the results of the autopsy are damning: she was indeed murdered. At the same time Rovère investigates the murder of a taxi driver. Very quickly, they realize that the two cases are linked... A second murder, that of a fashion photographer with a scandalous reputation, occurs. Nadia and Rovère will have to reconstruct the evening where Nathalie died and prevent the killer from continuing to kill his alleged assassins.

Théo, 10 years old, is found dead in a vacant lot, his skull shattered. Théo was the treasured child of a lonely couple, Audrey and Paul Sander. Very quickly, Rovère's investigation turns towards a theory of family jealousy: Audrey's sister, Karine, had sent the couple letters with death threats. Karine, who lives with a young thug on parole, is therefore his first suspect. However, Nadia, who feels the couple are weighed down by a strange atmosphere, thinks that Rovère is on the wrong track.

American rock star Jim Raven dies in a motorcycle accident in the middle of Paris. Very quickly, Rovère and Nadia Lintz understand that Raven was being chased by paparazzi. Louis Féral, an old adventurer, and his colleague Fred Koski, younger and more fiery, are indicted for harassment and manslaughter. Both are partners in a strange celebrity photo agency, Exclusif Press. The day after his custody, Koski is found murdered at the bottom of a lock...

Alain Calmels, owner of a small hotel at Porte de Clignancourt, is murdered. On site, Rovère realizes that Calmels was a small-scale blackmailer. Settling scores after sordid blackmail? Some press cuttings found near Calmels' body guide the investigation into the Isabelle Duhesme affair. A young upper-middle-class girl who disappeared five years earlier.