A teenage girl found naked and fatally injured in a mountain forest two hundred miles from her home. The mutilated corpse of a young man in the Nevada desert, his heart and eyes removed. The post-apocalyptic world of a role-playing computer game - and the murderous spree of a psychopathic killer driven by delusions of superhuman supremacy. And rookie detective Summer Zeigler, pitched headlong into her first major case. But even as she tries to unpick the killer's twisted logic, he lures her into a cat-and-mouse game with a spectacular climax of his own devising.