She claims to be your daughter, and you let her into your life. You trust her unconditionally. Until it's too late... The big Sunday Times bestseller - "Karen Perry's best novel." Tana French. One afternoon, Zoë Barry stands in Professor David Connolly's office at Dublin University and claims to be his daughter. David is taken aback and can't believe his ears. After the initial shock, he introduces Zoë to his wife Caroline and their children. Soon, the young woman becomes part of the family and even moves in with the Connollys. However, while she appears shy and vulnerable in David's presence, she shows a different side to Caroline - cool, calculating, almost sly. Is Zoë really who she claims to be? Who have the Connollys let into their home and their lives? A daughter? A sister? Or a complete stranger who is patiently waiting?.