The fiasco of the search of the Roma camp leads the police to resume the investigation of the Bac. Arnaud Beckriche asks Laure and his colleagues to focus their efforts on Jolers and Calvi to establish the extent of corruption. Herville has confirmation that one of his men has warned the mayor of the operation to make it fail. To appease her revenge, Josephine takes action. In addition, Romy's health is improving.

Cars burned, vandalized bus shelters: anger is brewing in the city after a police blunder. The population thinks the police have abused their authority and used violence inappropriately. Some take advantage of the confusion to stir up trouble in the streets. Chaos is not far off. The prefect makes the point with the commissioners Herville and Beckriche and prohibits any questioning so as not to cause more riots. The extremely tense situation causes the Calvi to panic, while Jolers keeps a cool head. He intends to take advantage of the situation of Drissa Camara, who is at bay.