Chief Inspector Laure Berthaud and her team of tough uncompromising cops are called in to investigate a double murder. The ensuing investigation soon reveals the tensions within police team and their legal colleagues.

The investigation into the murder of the mother and daughter continues with the hunt for the missing father and young son. Meanwhile Chief Inspector Berthaud struggles with her own personal problems.

The double murder investigation steers Laure's team towards a group of bank Raiders. Laure is not convinced of Jaulin's guilt.

Laure tries to convince Roban that he is mistaken in his pursuit of Jaulin and decides to concentrate on tracking down the raiders.

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 a double murder.

Following the attack on Kimberly, the noose tightens around the criminal activities of Karen's girl gang. But as it closes 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.