Ronald Millar died aged 80. After a shocking incident four years before his death, Ronald became a recluse, his only contact with the outside world coming through volunteers who helped him with shopping. But he left behind an estate worth 30,000 pounds and the Fraser team is soon in a race against time to find any descendants. At Heirtrace in Suffolk, Derek Rodbard is working to trace the descendants of people killed during the Holocaust - the systematic genocide of the Jews by the Nazis. Focusing on Ernst Hornung, a Jewish professional who was killed leaving a still-unpaid life insurance policy, he soon discovers a son, Otto. But for Otto, the money is of secondary importance. As Derek delves deeper, a tale emerges of incredible courage and tenacity, of a family determined to maintain its unity despite being torn apart by events, and of a Swedish diplomat's extraordinary efforts to save the lives of 100,000 people.