A public prosecutor is teamed with a hardened police captain and a magistrate to identify a body found discarded in a skip. As the case unfolds, their investigation uncovers deception and political intrigue.

The police make an appeal to the Press and get their hands on Elina's diary - which reveals she had friends in high places. Pierre discovers a connection between the murder victim and a childhood friend of his, now a wealthy businessman - and it seems they met the day before she died.

The police delve into the personal life of a businessman who burned to death in his own home, Clement struggles to conceal his friendship with a suspect in the Andrescu case, and Gilout's drug habit gets out of control. The mother of a murdered baby is accused of negligence.

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. A distraught Ghislaine Androux is brought to trial in connection with the murder of her baby, but Judge Roban soon begins to regret meddling in the affair.

Pierre begins divorce proceedings after his estranged wife is implicated in a drug trafficking scandal. Josephine defends a man accused of committing brutal acts of torture, while Gilout's drug addiction tests Berthaud's patience

Pierre Clement unwittingly endangers Benoit Faye's life when he resolves to have his friend arrested in connection with the Andrescu case. Lawyer Josephine Karlsson is called in to defend a young man accused of rape, while Gilout is compromised by blackmailers.

With Benoit Faye in intensive care following an assassination attempt, the prosecution in the Andrescu case has lost its main witness. The events leading up to the sisters' double murder are reconstructed using Benoit's recollections.