This is a disturbing movie, a courtroom drama in which a man claiming to be Josef Mengele voluntarily returns to Germany for trial. He enlists an unwilling lawyer to defend him in a court of law. The lawyer must defend the indefensible, an act he finds personally repugnant but accepts because of a need to understand the holocaust and what let it happen. The answer seems to be that unspeakable evil lurks closer than one might comfortably imagine.