In the small country town of Warwick in Queensland, Australia, a child psychopath, local Vince O'Dempsey, sets out on the long road to mass murder. He terrorises this quiet farming community, dropping out of school, spending time in a mental institution, then torturing animals and sexually assaulting other children. Author and journalist Matthew Condon, who has worked on the O'Dempsey case for ten years, investigates the early years of Australia's worst serial killer.