Michèle visits her daughter in the hospital and finds it hard to leave. Marie finally opens the famous letter that Lucie gave her from Yvon. Agathe plans to resign but Normand suggests him take a few days off. Lea tries to get in touch with her mother ...

New recruit of the personnel of the Unit 9, Nancy Prevost is not slow to make taste its methods muscées to the prisoners. Marie is shocked by the excavation orchestrated by Prévost. Determined not to let themselves go, Marie and her cellmates organize to denounce the extreme methods of the supervisor ...