Now that the operation to capture Zacharie Gabbai has failed, he is on the run. The police decide to set him a trap. Laure looks into the period in which Sandrine Jaulin's parents worked as a foster family, and a troubling history emerges. Carole Mendy requests Roban's help in a case of violent abuse involving a powerful Libyan businessman, Tarek Ziani. Gilou faces disciplinary action for the use of less-than-legal investigative methods.