When a body is discovered in a quarry, DI Karen Pirie and her team are tasked with reopening the case of the infamous 1984 kidnapping of an heiress and her son.

With suspects under attack, Karen's cold case review becomes a live investigation. Is someone out for revenge for Rosie's death, or trying to ensure that the truth remains hidden?

Karen is forced to confront a version of the truth she never thought possible - with everything at stake, will she finally find Rosie's killer and achieve justice after 25 years?