When the body of a young woman is discovered close to a highway service station, Detective Inspector Anna Travis is brought on to the team of investigators by her former lover and boss, Detective Chief Superintendent Langton. As more evidence is uncovered, the team realizes that they are contending with a triple murder investigation—and no suspect.

But then a murderer Anna helped arrest years ago makes contact from prison. Cameron Welsh insists that he can help track down the killer, but he will divulge his secrets only to Anna herself. Does he really have an insight into another criminal’s mind, or is he merely intent on getting into hers?

The team soon realizes that they are dealing with a killer whose deviousness has enabled him to commit horrific crimes, yet remain undetected for years. As the case draws to a close, Welsh’s obsession for Anna fuels a terrifying rage that will have disastrous consequences for Anna, who finds herself staring into the face of a desperate personal tragedy.