Where Have You Been? is a gripping domestic thriller that takes the form of a classic impostor story, with a 21st-century twist. 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 20 years: drugs, prostitution, prison. As Carly insinuates herself further and further into the Middleton’s lives, suspicions are aroused – is she really Susan’s sister, returned from the dead? If she isn’t Karen, who is she?