In Ava's dreams, her son, Noah, looks just the way she remembers him: a sweet two-year-old in rolled-up jeans and a red sweatshirt. When Ava wakes, the agonizing truth hits her all over again. Noah went missing two years ago, and his body has never been found. Almost everyone, including Ava's semi-estranged husband, Wyatt, assumes the boy drowned after falling off the dock near their Church Island home. Ava has spent most of the past two years in and out of Seattle mental institutions, shattered by grief and unable to recall the details of Noah's disappearance. Now she's back at Neptune's Gate, the family estate she once intended to restore to its former grandeur. Slowly, her strength is returning. But as Ava's mind comes back into focus, her suspicions grow. Despite their apparent concern, Ava cannot shake the feeling that her family, and her psychologist, know more than they are saying. But are they really worried for her well-being--or anxious about what she might discover?