Frieda Klein is a solitary, incisive psychotherapist who spends her sleepless nights walking along the ancient rivers that have been forced underground in modern London. She believes that the world is a messy, uncontrollable place, but what we can control is what is inside our heads. This attitude is reflected in her own life, which is an austere one of refuge, personal integrity, and order. The abduction of five-year-old Matthew Farraday provokes...