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.

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.