Sergeant Peter Knowles has seen it all: in Afghanistan he witnessed death on a level that no-one should walk away from. Returning to Britain, he jumps at the chance to lead a small team in Devon. The task sounds more like a holiday; exactly what Knowles and his men need. The mission: watch Jack Stadler. Jack has always led a quiet life, but now he is suffering blackouts and has violent fantasies. When the first dismembered body is found, Knowles begins to realise he has made a terrible mistake…