Ex-constable Claire Church has fled her dark past by escaping to the remote Western Isles with her partner, Norrie. But no matter how far she runs, she can't escape the shadows cast by her history, and as decades-old bodies are unearthed on a Manchester building site, the darkness threatens to fracture her life once more.
DCI John Hind immediately suspects the bodies are connected to a case that dates back to 1998: women who were reported missing, but who few cared about... apart from his former protege, Claire. Harassed by his own impending misconduct investigation, Hind realises there's only one option available - he must reconnect with Claire.
John's reappearance in her life rocks Claire, immediately threatening the seemingly idyllic, but fragile, life she's built with her devoted family. Desperate, John appeals to Claire's conscience and sense of guilt to help him catch the killer. But is John there to win justice, or Claire?
Torn between her desire to help those women she believed she failed all those years ago, and a fear of the darkness that once engulfed her, Claire must choose a path. All she really wants is peace, but with the past bleeding irreversibly into the present, Claire can't hide any longer - especially when a new body is discovered carrying a message for her future.