Jeanne Vanhoven makes her big comeback to the assizes: she defends, with Maxime, David Kerval, a novelist suffering from obsessive compulsive disorder, accused of the murder of his wife. At the same time, Claire assists Jacqueline Arsena, mother of a young woman killed by Xavier Durieux, a drug addict who has just filed a request for early release. Idriss, for his part, learns that his health has deteriorated considerably...

While Idriss and Nadia travel to Paris for the trial of Carl Roussel (Stéphane Blancafort), the man who shot Idriss, Claire finds herself in the eye of the storm: Jacqueline Arsena has committed a murder and had warned her of her intentions.