Germany, 1938: In Berlin, his owners christened him Levi. When they fled to America, he became Hercules – star of the silver screen in Hollywood's golden age. Then he caught the eye of Hitler, who called him Hansi. A pure-bred lapdog – privy to all the Führer's secrets. But he was known to the Resistance as Sirius. The insider who could bring peace to a world at war… Now it is time for his story to be told.