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. Then, in one day, their lives are turned upside down when Amber fails to return home.
With a new job and boyfriend Sarah seems to be moving on with her life, but Ben is still convinced that Amber is alive and, in a moment of reconciliation with his ex-wife, celebrates Amber's birthday in her absence.
S1E4 50 min