Death of a Rookie (2021)

Police cadet Fred Leprince is found dead inside the police academy. His sister Émilie, also a cadet there, doesn't believe the suicide theory. Her suspicions are soon confirmed by Commander Anne Voreppe and Captain Chrystel Chesnot, who are investigating the case. They establish that it was indeed murder. Investigating among their peers turns out to be a delicate affair for the two detectives.