 Set in the fictional town of Westbridge, the series was filmed in Liverpool, Wirral, Runcorn, and surrounding areas, including Frodsham.On 18 July 2016, Sky1 confirmed that a follow-up series had been commissioned and will be titled "The Four"; it is unknown when the new eight-part series will enter production.In 1995, four young school friends, Mark, Danny, Slade and Pru are left traumatized after Mark's five-year-old brother Jesse disappears after playing in the park with them.