A threatening message addressed to Lily-Rose greatly worries the squad. A chambermaid at the Rive-Droite hotel is well known to the police. Surveillance images show Charles leaving the hotel, but no trace of Aurélie.

Big news shakes the Cerberus squad and breathes new life into the investigation. Aurélie's return to the electoral race is not going smoothly. Pénélope tries to help Aurélie to remember repressed events.