A gang of thieves pass themselves off as police officers in order to take advantage of the gullibility of the elderly. The criminals, belonging to a group of travellers, are arrested. But the victims have difficulty in identifying them and the travellers' community closes ranks to protect the black sheep.

The party is at its height in the sumptuous apartment of a former government minister, when one of the guests takes a fall. Suicide, accident or attempted murder? The same evening, mysterious visitors succeed in entering the home of a journalist to place hidden microphones...

During a banal identity check, the police discover the photograph of a tortured teenager in the wallet of one of those who have been stopped. The investigation centres on a settling of scores between two rival gangs...

A complaint has been made against Viking, accused of having beaten up the father of a young racketeer. But his situation becomes more serious when a thief is found dead in his cell and everything seems to point to the police officer, including a witness...

A young Asian girl is knocked-over by a hit-and-run driver who leaves the scene after having called an ambulance. From this apparently banal accident, the police end up investigating a new form of slavery.