The father of a teenage girl who has been missing for several months receives an alarming letter regarding his daughter's condition. Matthieu and Chloé reopen the investigation.

A big-hearted activist is found dead in a fire at a run-down hotel. Matthieu struggles to deal with Chloé's blunders in a case where private and public lives are closely intertwined.

The young wife of a wealthy art dealer is found savagely stabbed by her swimming pool. Chloé and Matthieu focus their investigation on the victim's husband, a possessive man in his fifties who is nowhere to be found.

The murder of a young lawyer, devastated by the dramatic consequences of his first trial, leads Matthieu and Chloé to the trail of a psychologist who practices hypnosis.

A young oncologist is found poisoned in his own department. Chloé's support will prove crucial in helping Matthieu solve a case that echoes the recent death of someone close to him.

It is while standing over the body of a disfigured young woman that Commander Matthieu Pérac learns he will henceforth have to team up with Chloé Saint-Laurent. Pérac is one of the best Judicial Police commanders in Paris—a hands-on cop who protects his men just as he does his family.