When a London social worker discovers the dead body of a stranger in a client's home, Frieda Klein identifies the victim as a notorious con man who she fears has been murdered by enemies determined to embroil Frieda in the investigation.

Declared a person of interest when a body is discovered under the floor of her home, London psychologist Frieda Klein realizes that a copycat killer is responsible before she finds herself caught between two obsessive murderers.

A decade ago, 18-year-old Hannah Docherty was arrested for the shocking murder of her family. It was an open-and-shut case, and Hannah has been incarcerated in a secure psychiatric hospital ever since. When psychotherapist Frieda Klein is asked to meet Hannah and give her assessment, she reluctantly agrees. But what she finds horrifies her. Hannah has become a tragic figure, old before her time. And Frieda is haunted by the idea that Hannah might...