When fourteen-year-old Zoe Johnson doesn't come home on a Monday night in early December, the alarm bells in Kings Lake Central police station do not ring straight away—after all, she's from the Dockmills, one of the toughest estates in the town. But for Detective Sergeant DC Smith, due to retire in just three weeks' time, there are some strange echoes of the case that has haunted him for the past thirteen years. Maybe it's simply his over-developed sense of irony, or maybe, in his final days as a police officer, Smith must look once more into the eyes of a serial killer.