Bernard Chéron

37 000 years ago, two neighboring tribes lived in peace ... not fully in peace. While the tribe clean hair flowed peaceful days by keeping to herself the secret formula shampoo, Tribe Hair Sales lamented. Its leader decided to send a spy to steal the recipe ...

The disappearance of a young woman puts two forensic police officers on the trail of a serial killer. Their fears are confirmed by the discovery of several corpses, what follows is a long hunt across Paris.