That's not so usual for our lead character to track a serial killer down. I am not fond of this kind of topic which we find so many times since décades. But this story is very strongly made, The directing and acting are convincing at the most, especially for a TV show from TF1 channel, provider of such crap as NAVARRO and JULIE LESCAUT. Here the usual investigation but where you are glued to your seat. Yves Rénier is terrific as usual.