After the failure of the operation, Saïd is demoted and Patrick takes over as head of the group. Éric Perez is convinced that the El Hassani gang is responsible for the attack on his son. He is plotting his revenge. For their part, Saïd and Julien locate the hideout of Julien's informant, responsible for the failure of the operation, the BRI intervenes and apprehends his accomplices but the latter remains untraceable.

Nina, the daughter of Éric Perez, accuses one of the El Hassani brothers of the murder of one of his relatives. Convinced of his innocence, Saïd warns him so that he can flee. In exchange, he delivers information helping Socrates in his investigation. Patrick and Badri, meanwhile, are sent by Ferracci to Morocco for a special operation.