Ridley and Carol are close to cracking the murder of a local man. Their leads unveils connections to a stud farm, a drug dealer, and a wealthy businessman. The missing piece is held by an unlikely person with a closely guarded secret.

Ridley's investigation into the body found in a hollow tree leads him to suspect different men in the victim's life. When another body is found murdered, with links to disgraced ex-copper Jean Dixon, the pressure builds to find the killer.