Along the shores of Oregon s wild Columbia River, the Victorian mansion where Sarah McAdams grew up is as foreboding as she remembers. The moment she and her two daughters, Jade and Gracie, pull up the isolated drive, Sarah is beset by uneasy memories of her cold, distant mother, of the half-sister who vanished without a trace, and of a long-ago night when Sarah was found on the widow s walk, feverish and delirious.