Vladimir's revelations about Rachel launch Lily-Rose onto a new path. The interrogation of Gaëlle Naubert reveals surprising information concerning a student. Rachel and Naela receive text messages that terrify them.

The squad is called to the scene of a crime whose staging is disturbing. Marius's lies and Roseline's revelations make them suspect in the eyes of the investigators. Jennifer confirms the murder weapon and the result is astonishing.