It's late 1942; the war is still raging and the upcoming Christmas season looks bleak. Detective Inspector Tom Tyler is settling into his placement in Ludlow, Shropshire, a small town jammed with people sent there by the conflict. Tyler's job is both to keep the peace and to enforce wartime regulations. Then a troubled old man goes missing in a winter storm. The next day his body is discovered in a secret hideout supposedly known to very few. It soon becomes clear that a crime has been committed, and there is no shortage of suspects.