Erich Priebke spent fifty years as a respected member of a German expatriate community in Bariloche, Argentina, before American television journalists tracked him down. The film reconstructs his wartime role as a senior Gestapo officer in Rome, where he helped carry out the Ardeatine Cave massacre, the execution of 335 Italian civilians ordered in retaliation for a partisan bombing that killed German soldiers. Archival footage and photographs establish the atrocity and Priebke's postwar escape route to South America, while interviews follow the reporters who located him decades later and confronted him on camera, breaking a case that Italian and international authorities had left cold. The documentary traces how Priebke maintained a normal life as a school administrator and butcher in the Argentine countryside, protected by distance and time, until his on-camera admission triggered extradition proceedings back to Italy. It is a story about the mechanics of impunity as much as the crime itself, showing how a mass killer can hide in plain sight for half a century.