Dessau, Germany, 1939. A 49-year-old veteran of the Great War hobbles over to his sleek, green racing car, hands his walking stick to his mechanic and awkwardly pulls his damaged leg into the bowels of the machine. His hosts, the glamorous young drivers of the Nazi state-sponsored Silver Arrows team, share bemused grins as he rolls up his sleeves, dons an old-fashioned leather racing cap and pulls down his goggles. A few minutes later, to the astonishment...