 The film follows a young soldier responsible for taking the ID photos of thousands of people before they were tortured and murdered by the Khmer Rouge.The documentary was nominated for an Oscar for Best Documentary Short.Nhem En was 16 years old when he was the staff photographer at the Tuol Sleng Prison, also known as Security-21, where from 1975 to 1979 approximately 17,000 people were registered and photographed, then imprisoned and tortured before being killed.