When a homeless man is found strangled to death, Detective Sergeant Geraldine Steel is caught off guard by the cold-blooded nature of the crime. A second murder suggests the existence of a killer whose motive is as elusive as he is dangerous. In an investigation plagued by police scepticism, only Geraldine is relentless in her pursuit of the truth. As she is forced down unexpected avenues into the lives of three people caught in a toxic triangle of love and deceit, she discovers there is more to this case than any of them could have imagined.