Even in wartime, the deadliest threat can be terrifyingly close to home…

December 1940. With the Blitz devastating Britain’s cities, Lizzie Hayes and the women pilots of the Air Transport Authority are more crucial to the war effort than ever before. But when the relative peace of the village of Scotney is shattered by the disappearance of the Chief Inspector’s niece, it’s Lizzie’s training as a psychologist that draws her into another disturbing police case alongside DI Jonathan Kember.

Events threaten to overtake the pair when a local shepherdess is found murdered - and there’s something strange missing at the scene of the crime. As more bodies turn up, each bearing the same hallmark, Kember realises the campaign of terror will only escalate unless they can use Lizzie’s training to get into the killer’s mind.

With Kember’s superiors set against Lizzie’s involvement, he risks his reputation and his career - but it’s Lizzie who risks everything by putting her own life on the line in a desperate effort to unmask the murderer. With war raging around them, can they halt the killer before it’s too late?