Veteran Boogey Man and Zodiac Killer director Ulli Lommel continues his long tradition of delivering tense thrills with this relentless look at the life of the elusive, Kansas-based serial killer known to authorities only as "B.T.K." before his arrest...

The story of the most famous serial killer in the United States who frightened Americans in the seventies. He was never caught by the police and remained an unsolved case. The only trace he leaves is a zodiac sign at the crime scene. A possible motive is sexual, driven by hatred against women and homophobia. A faceless killer who could be the neighbor who lives next door, waiting to kill the next victim.