When three dead bodies are discovered in Detective Ian Peterson's hometown of Kent, it becomes clear that a vicious killer is on the loose. And without his trusted colleague, Detective Geraldine Steel, by his side, Ian's left to take the lead on a complex murder case with few clues.

The first victim is a middle-aged woman named Martha, brutally stabbed to death in the local park. Her husband, who did not report her missing, is the prime suspect until a young prostitute, Della, reveals his whereabouts the night Martha was murdered. But then she is strangled to death in her apartment. While the police are frantically gathering evidence and looking for a connection, a second prostitute is suffocated.

With nothing but the timing of the murders to tie the three women to one another, Ian and his new partner, Polly Mortimer, struggle to make sense of the case and find the elusive killer before he strikes again. But by the time Ian realizes the truth, it may be too late to save Polly.