Four months after the Khmer Rouge establish their regime, a local high school in Phnom Penh is converted into what will become the notorious S-21 or Tuol Sleng prison and interrogation center run by the man known as Duch, later deemed “Cambodia’s Heinrich Himmler.” Between 1975 and 1979, roughly 17,000 people, labeled traitors, will be brought to the prison, tortured in order to extract “confessions” and systematically executed outside of the capital.