From NetFlix:

After confessed killer Gabriel Engel (André Hennicke) is captured, small-town cop Michael Martens (Wotan Wilke Möhring) interrogates him, hoping a journey into the madman’s twisted mind will give clues to an unsolved murder committed in the same heinous manner as Gabriel’s crimes. Gabriel claims to know the killer’s identity but turns the investigation into a psychological game, leaving Michael questioning his own sanity in this German thriller.

This German film is easily one of the best serial killer films I have seen. There are two themes intimately related: On the one hand there is the usual tug of war between a jailed serial killer (think “Hannibal Lector”) and a rural policeman with whom the killer is willing to converse. On the other hand the policeman is a decent, religious man at odds with his father-in-law. In jousting with the killer the policeman struggles to remain non-cynical and to believe is the possibility of good and innocence.

Finally the plot drives toward an unexpected twist at which I will not even hint. However, I was disappointed in a part of that very ending which seemed a bit contrived. Opinions ?

Please ignore the very opening of the film. It is sensationalistic and gory and need not even be watched to enjoy the rest of the film.