The most violent thunderstorm in living memory occurs above a sleepy village on the West Coast of Scotland.


A young couple take shelter in the woods, never to be seen again...


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DCI Jack Russell is brought in to investigate. Nearing retirement, he agrees to undertake one last case, which he believes can be solved as a matter of routine.


But what Jack discovers in the forest leads him to the conclusion that he is following in the footsteps of a psychopath who is just getting started. Jack is flung headlong into a race against time to prevent the evolution of a serial killer...