A serial killer who continues to fascinate the media and the public to this day. A true crime thriller that explores the souls of a murderer and his hunter. An author who was himself the lead investigator in this most spectacular Austrian criminal case: Ernst Geiger fictionalized the story of Jack Unterweger 30 years after his death. His novel, filled with dramatic twists and compelling characters, almost makes you forget that it is based on real events. It tells the story of a man who could not change. And the lives of those people, whose lives were forever altered because of him.