When two boys vanish under mysterious circumstances, the local community is filled with unease. Then a bloodstain is discovered in a disused World War Two hangar nearby, and a caravan belonging to one of the boys is burned to the ground. Assigned to the case, DCI Banks and his team are baffled by the mystery laid out before them. But when a motor accident throws up a gruesome discovery, the investigation spins into a higher gear. As Banks and his team struggle desperately to find the missing key to the puzzle, they find themselves in a race against time where it's their turn to become the prey.