On the same day, Fliss finds out she's going to be 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 Hines. All three are now free, and the child protection zealot who did her best to send them to prison for life, Dr Judith Duffy, under investigation for misconduct.