1985: Detective Inspector Gwyn Roberts is sent to a quiet seaside town to investigate an unusually threatening and vile anonymous letter, leading him to the home of mild-mannered clergyman, the Reverend Emyr Owen. What he would find was a discovery so shocking that the law system would attempt to bury the case. The Reverend was guilty of abusing and mutilating human bodies awaiting burial. This disturbing yet fascinating story is brought to light with interviews from police officers, psychiatrists and legal experts, interwoven with dramatic recreations that delve into Owen's history and unearth questions about his crimes that remain unanswered to this day.