Life seems perfect in Valley Farm, a quiet community in Northumberland. Then a shocking discovery shatters the silence. The owners of a big country house have employed a house-sitter, a young ecologist named Patrick, to look after the place while they're away. But Patrick is found dead by the side of the lane into the valley...D.I. Vera Stanhope arrives on the scene, where she finds the body of a second man. All the two victims have in common is a fascination with moths - catching these beautiful, rare creatures. Those who live in the Valley Farm development have secrets too: Annie and Sam's daughter is due to be released from prison any day; Nigel watches, silently, every day, from his window. As Vera is drawn into the claustrophobic world of this increasingly strange community, she realizes that there may be deadly secrets trapped here...