The most commercial psychological suspense novel yet from critically acclaimed Sophie Hannah. TV producer Fliss Benson is working on a documentary about miscarriages of justice involving cot death mothers wrongly accused of murder. The documentary will focus on three women: Helen Yardley, Sarah Jaggard and Rachel Hind. All three women are now free, and the doctor who did her best to send them to prison for life, child protection zealot Dr Judith Duffy, is under investigation for misconduct. But then one of the acquitted mothers is murdered - and so is the doctor whose evidence convicted her...