As group leader of the Judicial Police in Paris, Martin is responsible for investigating the most atrocious and misogynistic crimes committed against society. Distrustful of everyone, he bears the marks of both his past successes and failures. Luckily, the ladies in his life are on hand to assist him.
The life of the Marquise de Maintenon, who was the wife of the poet Scarron before becoming, under the seal of a secret marriage, the wife of King Louis XIV.
35-year-old Audrey, the only survivor of a mysterious serial killer who raged in the Biarritz region 16 years earlier, is brutally taken back to her past by a new crime: a 17-year-old girl is found murdered on the Basque coast. Nothing links this murder to the series of crimes committed in the early 2000s by the "Itsas Killer," but Audrey is certain that Itsas is back.
In the west of Paris, strange murders are committed. The victims are eviscerated before being arranged in a macabre display. While discovering one of the victim, Police commander Eric Lanester loses his sight... as well as the control of the case. But with help of a young woman taxi driver, the cop nevertheless continues his investigation.
After 25 years in exile, undercover cop Frank Riva comes back in Paris. He faces mob boss Norbert Loggia and his son Maxime, who put a bounty on his head during the French Connection days.