At dusk on a warm evening in 2016, two men arrive, unexpectedly, at a remote South African farmhouse. The frenzy that follows will come to haunt a community, destroying families, turning neighbours into "traitors", prompting street protests and threats of violence, and dividing the small farming and tourist town of Parys along racial lines. Correspondent Andrew Harding has followed every twist of the police’s hunt for the killers, the betrayals that opened the door to an explosive trial, and the fortunes of all those involved – from the dead men’s families to the handful of men controversially selected for prosecution.