It's about a rock band male singer that is a psychotic killer. He has dreams about a nordic God warrior without face and he wants to catch a girl to offer a sacrifice to this warrior.
A policeman try to catch him. I remember a strange building with mirror windows.
At the end the singer killer (I think that uses a sword) goes on a motorcycle and is decapitated with a cable handled by the policeman and a girl.
I think that there is Manowar music in the movie.