Four Lives tells the story of four victims of Stephen Port: Anthony Walgate, Gabriel Kovari, Daniel Whitworth and Jack Taylor and their families and friends who worked tirelessly to find out what happened to them. The series goes beneath the headlines to shed new light on this story by telling it from the point of view of the families of Port's victims, focusing on their fight to uncover the truth about what had happened to their lost sons and brothers in the face of a now widely-criticised police investigation.