Peter Rohm is a successful lawyer living in Berlin with his wife Rebekka. One day, Peter receives an unusual package in the mail — a Nazi officer's uniform. Puzzled, Peter does some research which suggests that the uniform once belonged to fugitive war criminal Josef Mengele. Peter is soon visited by a mysterious stranger named Mueller, who slips him a powerful drug. When he awakes, Peter is in Argentina, where he's introduced to an elderly man who has lived for years under the name Heinz Baumgarten, but announces that he is in fact Joseph Mengele. Mengele has decided to return to Germany to stand trial for war crimes, and he wants Peter to represent him; Peter reluctantly agrees. As the German media goes into a frenzy and angry demonstrations crowd the streets, Mengele calmly argues that he was merely a research scientist whose work ultimately aided humanity, and that no firm evidence links him to any murders. While a handful of eyewitnesses offer support to the accusations against Mengele, no one seems able to present hard evidence that contradicts Mengele's claims.