What Mietek Pemper has to tell is unique in many ways. For 500 days, from March 1943 to September 1944, the Jewish prisoner had to work as a personal stenographer for Amon Göth, the notoriously ruthless commander of the forced labor camp and later the concentration camp Kraków-Plaszów. For 500 days at the epicenter of evil, he obtained secret information that enabled him to develop a rescue strategy for over a thousand of his fellow inmates. In this role, he operated between devil and angel, with the angel being Oskar Schindler, who, thanks to Pemper's plan, was ultimately able to write his famous lists, saving many lives from death. An extraordinary story of courageous action and cunning resistance in the hell of mass extermination.