Months after World War II, an extraordinary discovery was made inside a captured Nazi official's coat lining: the last will and testament of Adolf Hitler. Discover the untold story of the notorious dictator's controversial final document, written just hours before he took his life, and learn the secrets he tried to take to his grave. Our investigation reveals the only surviving witness of the will's discovery, the Austrian salt mine where Hitler hid his stolen art collection, and the surprising home of some of Hitler's last-known relatives.