It's a commotion at the PJ offices. A woman in a police uniform committed suicide in Chistera's office during the night! Everything suggests that a colleague killed herself at her workplace to denounce the working conditions of police officers on duty. However, no one recognizes this colleague, and no papers are found on her. Chistera orders all departments to make themselves available to Darius and his colleagues, much to Marijo's delight! But very quickly, the Invisible's profile proves difficult to reconcile with that of a police officer. Who is Marianne? Why kill herself and denounce all this if she's not "from the house"? The truth probably lies with Driss, a young thirty-something under pressure in a housing project run by Vince, who seems to want to entrust Driss with more and more responsibilities. Around him, there are jealous people, a woman, and above all, a disappearance that will reshuffle all the cards...