A veteran beat cop as well as teenage girl be up to their fatalities from a tower block in south-east London, leaving a five-year-old kid and also rookie policemans Lizzie Griffiths on the roofing, only for them to go missing out on. Detective Sergeant Sarah Collins is composed in to explore, working to find Lizzie before she comes to serious harm, however additionally to uncover the reality behind the shocking tower block deaths.