The murder of a young prostitute in Sweden causes Anna petersson, Criminal Psychologist, to be called in by the police to advise on and help with their investigations. The discovery of a photograph in the victim's possession of a man who looks uncannily like her father leads her to travel to London not only to liaise with the English authorities, but also to search for the truth behind the photo. A thousand questions must be answered before Anna discivers the truth of the case as well as of her own life.