Gilou agrees to work with Laure again. She must find her place now that Ali and Gilou are a team. The most important thing is finding young Ryan and his gang. Edelman does everything he can to get Joséphine out of prison.
Ryan is not telling the whole story, so Roban decides to lock him up. The notes from the break-in contain traces of cannabis and the cops link it to a drug dealer in a neighboring housing estate.
While the money-laundering operation closes ranks and the 2nd DPJ must hand the case over to the Financial Crime Brigade, the team circumvents procedure in order to identify David Cann, a financial advisor who is implicated.
Laure and Gilou sink deeper into illegality by taking money offered by Solignac in order to pressure him, unaware that they are being followed by their former colleague, Tintin, now working for Internal Affairs.