![Robinson Crusoe](https://image.tmdb.org/t/p/w185/mowv0TDH2EaViEFjG4dZp2XdGus.jpg)
Kurt Gerstein—a member of the Institute for Hygiene of the Waffen-SS—is horrified by what he sees in the death camps. he is then shocked to learn that the process he used to purify water for his troops by using Zyklon-B, is now used to kill people in gas chambers.