Laure Berthaud leads an investigation into a shocking double murder, while Josephine Karlsson takes on the case of a man accused of killing a policeman.

Laure's team tracks down Stephane Jaulin, whose lawyer turns out to be Pierre Clement. The investigation widens to include other possible suspects.

New evidence emerges which proves damning for Jaulin. Herville presses on his team to nail the mugging ring. Josephine Karlsson comes up against an infamous, amoral lawyer in court.

Herville strives to endear himself to the police commissioner. Laure's team hires an informant who was already on the payroll of Bremont's crime unit.

While pursuing the raiders, police come across new evidence which could potentially shift the focus of the double murder investigation.

The police investigation into the double murder has uncovered a link between Sandrine Jaulin and Zacharie Gabbai's criminal gang.

The operation to capture Zacharie Gabbai has failed and he is now on the run. Carole Mendy requests Roban's help in a case of violent abuse.

Gilou is taken into custody, as his team looks on in dismay. Joséphine defends Tarek Ziani and engages in a power struggle with Roban.

The investigation picks up when police find a fingerprint amongst Gabbai's belongings which links to the crime scene of the double murder.

Following the attack on Kimberley, the noose tightens around the criminal activities of Karen's girl gang. But as the police close in, they strike again.

Roban can't stand to see Tarek Ziani elude his charges and tries to bring him down using the Crime Unit's investigation into a luxury vehicle racket.