"In 1939, Gustav Kleinmann, a Jewish upholsterer in Vienna, was arrested by the Nazis. Along with his 16-year old son Fritz, he was sent to Buchenwald in Germany, where a new concentration camp was being built. It was the beginning of a six-year odyssey almost without parallel. They helped build Buchenwald, young Fritz learning construction skills which would help preserve him from extermination in the coming years. But it was his bond with his father...