Young, well-intentioned Barry Kohler (Steve Guttenberg) stumbles upon a secret organization of Nazi Germany war criminals holding clandestine meetings in Paraguay and finds that Dr Josef Mengele (Gregory Peck), the infamous Auschwitz concentration camp doctor, is with them. He phones Ezra Lieberman (Laurence Olivier), an aging Nazi hunter living in Vienna, Austria, with this information. A highly skeptical Lieberman tries to brush Kohler's claims aside, telling him that it is already well known that Mengele is living in Paraguay.