When Annalee Ahlberg goes missing, her children fear the worst. Annalee is a sleepwalker whose affliction manifests itself in ways both devastating and bizarre. Once she merely destroyed the hydrangea in front of her Vermont home. More terrifying was the night her older daughter, Lianna, pulled her back from the precipice of the Gale River bridge. The morning on Annalee's disappearance, a search party combs the nearby woods. Annalee's husband, Warren, flies home from a business trip. Lianna is questioned by Gavin Rikert, a young, hazel-eyed detective. And her little sister, Paige, takes to swimming the Gale to look for clues. When the police discover a small swatch of fabric, from a nightshirt, ripped and hanging from a tree branch, it seems certain that Annalee is dead, but the hazel-eyed detective still continues to call, continues to stop by the Ahlbergs' Victorian home. As Lianna peels back the layers of mystery surrounding Annalee's disappearance, she finds herself drawn to Gavin, but she must ask herself: Why does the detective know so much about her mother? Why did Annalee leave her bed only when her husband was away? And if she really died while sleepwalking, where is the body?