Dr. Josef Mengele (Gregory Peck) clones Hitler 95 times, and hopes to raise the resulting boys in Brazil, giving them childhoods identical to Hitler's. His ultimate plan is to create a band of Nazi leaders that can continue where Hitler left off, forming the Fourth Reich. Ezra Lieberman (Laurence Olivier), a Nazi hunter, learns of the plan and is determined to thwart it. When the two meet face-to-face in the home of one of the Hitler clones, it is up to the boy to choose who he will assist.