Two Men, Two Worlds, One Cause.

Kurt Gerstein—a member of the Institute for Hygiene of the Waffen-SS—is appalled to discover that a poison gas he helped discover is being used to kill Jews. Driven by his conscience to alert the rest of the world, Gerstein teams up with a young Jesuit priest, Riccardo Fontana, but their protestations fall on deaf ears in the Vatican.