A school bus is hit by a train. Niemans and Delaunay investigate a chain of murders. The murderer leaves a claw mark.

A school bus is hit by a train. Niemans and Delaunay investigate a chain of murders. The murderer leaves a claw mark.

At an art school, a student is found dead, drained of her blood. Niemans and Delaunay are called in to investigate. As the strange deaths at the art school continue, the suspicions turn against the teacher Lilith.

Camille Delaunay is invited by Chloé to investigate a murder in the thick of the woods. Psychologist Eva, Chloé's childhood friend, helps them. Niémans comes to help Camille and solve the ritual murder.

Niemans and Delaunay escort a serial killer - Philippe Cernac, known for hunting his "prey" with a bow - to an experimental prison/treatment centre where psychopaths of all kinds are dealt with... Cernac escapes, but caught by Niémans, who's still trying, with his partner Camille, to find the killer.

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Camille Delaunay is invited by Chloé to investigate a murder in the thick of the woods. Psychologist Eva, Chloé's childhood friend, helps them. Niémans comes to help Camille and solve the ritual murder.

Niémans comes to help Camille and solve the ritual murder.