George Hennessey is beginning to accept the inevitable - that age is catching up with him and he needs to delegate to his young up-and-coming team. But there is no substitute for experience as he marshals his troops to investigate two parallel murders committed 20 or so years apart. First, a young man limps back from his father's funeral to report a murder he only now feels able to disclose. But naturally things are not quite as straightforward as they seem and the convoluted trail leads to a second more recent murder.
Hennessey and Yellich encourage their team to probe deeper as they uncover more sinister goings-on in the apparently tranquil Vale of York.