Josef Mengele ran the selection line at Auschwitz-Birkenau, sending prisoners to the gas chambers with a gesture and conducting grotesque experiments on twins and children under the guise of medical research. This film tracks what happened after the war ended: his escape through Europe on false papers, his new life in Buenos Aires under the protection of Argentina's expatriate Nazi networks, and the 1959 West German indictment that turned him into an international fugitive. Historians and investigators lay out the failed extradition attempts, the Israeli and West German intelligence efforts that came close to catching him, and the reasons he kept slipping away, aging quietly on the run while the world assumed he had been found. Archival photographs, wartime footage, and location filming in Argentina and Paraguay trace the manhunt alongside interviews that explain how a war criminal responsible for thousands of deaths could evade capture for decades. It closes on the eventual confirmation of his death and what that meant for survivors who wanted a trial rather than an obituary.