Susan and Ed Middleton are perfectly content with their lives. Two kids, two cars, a solid brick bungalow in the suburbs. There's barely a ripple in the surface of their happy existence. But when Susan's older sister, who vanished as a teenager, reappears to claim an inheritance, everything is set to change ... Karen - now known as Carly - has had a tough time during the past twenty years: drugs, prostitution, prison. As Carly insinuates...