Living in Dublin's suburbs, Ben and Sarah Bailey are recently separated yet doing their best to get on with their lives while remaining good parents to their children, Amber and Eamon. Suddenly, their lives are turned upside down when Amber fails to return home one evening. The disappearance of 14-year-old Amber Bailey sets off a two-year search during which time her family experiences unimaginable guilt, fear and devastating grief as they live out every parent's worst nightmare. Investigating the case of the missing teenager from different viewpoints, each episode plays with the chronology of events and focuses on the perspective of one individual connected to the case, as her family, friends and eventually complete strangers become drawn into the quest to find out what happened.