When a historic murder case in St Andrews becomes the subject of a provocative true crime podcast, Detective Sergeant Karen Pirie (Lauren Lyle) is unexpectedly tasked with heading up the cold case review. 25 years after Rose Duff's body was discovered abandoned in the Cathedral grounds, no one has ever faced justice. The only suspects at the time, the three drunken students arrested at the scene and stained with her blood. Interrogating the past Karen uncovers shocking fresh evidence and secrets surrounding Rosie's death. But when suspects start coming under attack the cold case becomes an urgent live investigation. Is someone out for revenge, or willing to risk everything to keep the truth surrounding the case hidden? Will Karen finally find Rosie's killer before it's too late?