Maureen Flynn is a woman with a secret. Sixteen years earlier, when she was a schoolgirl, something terrible happened to her. But the perpetrators of the shocking crime went unpunished. Maureen and her family left town, the affair was hushed up, and Maureen carved a new life for herself. Until now. A bitter rejection revives Maureen's long-suppressed memories, causing her to embark on a terrible quest for vengeance. Meanwhile, Detective Inspector Ruth Morgan and her team are baffled by a string of murders that have taken place in their quiet little town. In the past few weeks, four successful men in their mid-thirties have been stabbed to death, their corpses brutally defiled. It's up to Ruth to find the link between the victims - and hunt down a ruthless killer before it's too late.