A sadistic killer begins a string of ritualistic murders in Bradfield, forcing criminal psychologist Tony Hill into a high-stakes game of psychological cat-and-mouse. Hill is tasked with profiling a predator whose methods are uniquely gruesome, requiring him to navigate the dark recesses of a criminal mind that mirrors his own. As the investigation deepens, the boundary between the hunter and the hunted begins to blur, placing Hill in direct physical and psychological peril. The narrative utilizes a third-person perspective to oscillate between the clinical detachment of the investigation and the visceral, distorted reality of the antagonist's motivations.

This novel is widely regarded as a definitive entry in the British crime genre, noted for its unflinching look at the mechanics of serial violence. Readers and critics frequently highlight the complex characterization of Tony Hill, whose internal struggles provide a necessary counterpoint to the graphic nature of the crimes. The book is often cited for its ability to maintain tension through psychological insight rather than relying solely on action sequences. Its influence on the modern police procedural remains significant, establishing tropes that have since become staples of the genre. The work is consistently praised for its rigorous research into the criminal mind and its refusal to shy away from the darker aspects of human behavior.