DPJ group captain Laure Berthaud is responsible for investigating the case of a student blown apart by the bomb he was making. Soon he finds himself facing some far-left activists who advocate very radical urban guerrilla and direct targeting of police. Josephine Karlsson driven by her hatred of the police and government goes beyond her role as a lawyer and is trapped by the DCRI which monitors the far-left activists. Pierre Clément, who dreams of greater things, is wanted to defend Johnny Jorkal, a crime lord. Judge Roban, back to court after a long absence, finds he has been sidelined.

Berthaud and her team visit the scene of the immolation of a Kurdish detainee and spot Sophie Mazeret amongst the demonstrators outside the center.

Berthaud stakes out the Turkish restaurant that the Kurdish suicide victim was known to frequent and uncovers a work crew of illegal immigrants.

The autopsy of the Kurd reveals a hidden clue which leads Herville to upgrade the case to the highest priority. Special Branch try to blackmail Karlsson.

At a police meeting called when a youth is shot dead in a drive-by killing, Herville boasts that his unit will have arrests within 24 hours.

Berthault and her team are frustrated by new custody laws which ensure the presence of a lawyer during interviews.

When the police raid the Sarahoui's flat, Gilou takes the opportunity to break into their nightclub and retrieve incriminating evidence against him.

On learning of Cetin's release from police custody, the Ozbeks suspect him of informing against them and Rodi is ordered to eliminate him.

An online clue leads the team to the anarchists' squat, but during a raid Riffaut escapes. Judge Roban is given the results of his disciplinary hearing.

Kolabi is taken into custody, Karlsson attends court to defend victimised illegal immigrants and Roban attends a meeting with Prosecutor Machard.

The net draws in around Riffaut and his gang, but in-fighting within the police means that very dangerous loose ends remain on the streets of Paris.