Susan and Ed Middleton are perfectly happy in their model middle-class family on Sydney's northern beaches. But everything changes when Susan's mother wills half her estate to Karen, Susan's sister-a sister who disappeared twenty years earlier and has never been seen again.

The woman who turns up, claiming to her sister, isn't the Karen she remembers-but that was a lifetime ago. Are there glimpses of the girl she knew, or is it just her imagination? Karen's disappearance and presumed death all but destroyed her parents' lives-but will her return threaten the new life and family that Susan has worked so hard for?

Where Have You Been? is a mystery and a thriller, a story of hope, of betrayal-and the fragility of all we take for granted.