Each episode tells the story of one of Australia's most shocking murder cases, the victims and killers. Revolving around real-life phone calls placed by witnesses, the public, the perpetrators and from some victims beyond the grave. The series provides previously unseen interviews with the victims' families and the police, as well as unearthed crime scene footage and the phone calls that delivered the key piece of information and evidence that brought some of Australia's worst killers to justice.