Pierre must face the possibility that some of his nearest and dearest could be implicated in the murder case he is following, which is now linked to some very high-ranking names. Laure Berthaud's team investigate the apparent murder of a baby by his babysitter, while ambitious young lawyer Josephine Karlsson is recruited as the public half of a new legal partnership.

When the body of a well-known businessman is found charred to death in his home, police must delve into the details of his personal life. Meanwhile, prosecutor Pierre Clement's friendship with a prominent suspect linked to the brutal Andrescu murder has become impossible to hide. Gilout's drug habit gets out of control. Ghisele, the mother of the murdered baby, finds herself the target of an inquiry about negligent parenting and takes counsel from lawyer Josephine Karlsson.

The web of names involved in the brutal murder of Elina Andrescu widens to include a prominent ministerial adviser, who has links to prosecutor Pierre Clement's close friend Benoit Faye. Lawyer Josephine Karlsson and police captain Laure Berthaud come face to face in court when Laure becomes the object of an enquiry into the fatal shooting of two police suspects.

The inquiry into Elina Andrescu's murder takes yet another disturbing turn when the body of her missing sister Sophia is found in a freezer. Prosecutor Pierre Clement must recognise that the involvement of his friend Benoit Faye goes deeper than he'd been prepared to believe. A distraught and vulnerable Ghisele Anloux is brought to trial in connection with the murder of her baby - though judge Roban soon comes to regret his meddling in the affair.

Pierre Clemente initiates divorce proceedings when estranged wife Marianne and her family business become implicated in a drug trafficking scandal. Lawyer Josephine Karlsson is called in to defend a man who is charged with brutal acts of torture. Gilou loses control of his drug addiction, testing the loyalty of boss Captain Laure Berthaud.