The discovery of a dead banker sends shock waves through the sleepy coastal town of Ayr. It’s up to DI Bob Valentine recently back on the force after his near-fatal stabbing to find the killer. Leads are hard to find and the pressure is on from the Chief Superintendent who still has serious concerns about her DI's mental health. As it becomes clear that there's a serial killer on the loose, Valentine must battle the demons of his post-traumatic stress that's leaking frightening visions. Valentine is close to breaking point, but can he crack the case before he cracks up?