The Khmer Rouge ran what is regarded as one of the twentieth century’s most brutal regimes. Yet the Killing Fields of Cambodia remain unexplained. Until now. In this film, the men and women who perpetrated the massacres – from the foot-soldiers who slit throats to the party’s ideological leader, Nuon Chea aka Brother Number Two – break a 30-year silence to give testimony never before heard or seen. Unprecedented access from top to bottom of the Khmer Rouge has been achieved through a decade of work by one of Cambodia’s best investigative journalists, Thet Sambath, who is on a personal quest: Sambath lost his own family in the Killing Fields. The film is his journey to discover not how but why they died. In doing so, he hears and understands for the first time the real story of his country’s tragedy. WARNING GRAPHIC CONTENT: This film contains graphic images. Viewer discretion is advised.