Stewart Gilmour returns to his childhood home and tries to discover the truth behind his best friend's death.

England, 1954. On a train to London, Fitzwilliam meets Miss Pinkerton, who tells him that a killer is on the loose in the sleepy English village of Wychwood under Ashe. The villagers believe the deaths are accidents, but Miss Pinkerton knows otherwise — and when she’s later found dead on her way to Scotland Yard, Fitzwilliam feels he must find the killer before they can strike again.

After the promotion to Police Scotland's Historic Cases Unit, Karen Pirie reopens the cold case of murdered barmaid. Her investigation unearths flaws in the original 1995 inquiry.