The double murder investigation steers Laure's team towards a group of bank raiders. Laure is not convinced of Jaulin's involvement, but Roban insists that the father has failed to tell the whole truth. In order to impress the commissioner, Herville entrusts Gilou with the job of breaking up a network of muggers. Experts called to testify in the case of the dead police officer show that the police manipulated the evidence.