The story of one man's obsessive desire to control and kill women. For years John Taylor roamed wastelands and woodlands looking for his next victim. But it was only when he kidnapped and killed teenager Leanne Tiernan that his secret life and his past crimes came to light.

The film charts the unravelling of Taylor's past. It features exclusive access to the police investigation, interviews with those who knew Taylor, including a past girlfriend who details his disturbing sexual behaviour and moving testimony from Leanne's family.