Ingrid Coleman writes letters to her husband, Gil, about the truth of their marriage, but instead of giving them to him, she hides them in the thousands of books he has collected over the years. Then she disappears from a Dorset beach, leaving behind her husband, and her two daughters, Flora and Nan. Twelve years later, Gil thinks he sees Ingrid from a bookshop window. Flora, who has never believed her mother drowned, returns home to care for her father. She tries to discover what happened to Ingrid, not realizing that the answers are hidden in the books that surround her.--