The tension is mounting in this classic whodunit as more and more locals reveal themselves to be capable of murder.

Is it Leighton (William Ash), with his dark history, or mysterious Craig, the teacher who found the body and is lying about something? Could it be disturbed teenager Jonjo or maybe the uptight and creepy Dr Simon Marr?

With so many suspicious people milling about Lochnafoy it’s a good job Annie (Laura Fraser) is back on the case with her local knowledge and the need to prove herself to boss DCI Lauren Quigley.

But when Annie’s rebellious daughter Evie takes her mum’s car and drives off down a dark and lonely road, could the investigation prove to be a little too close to home?