George March's latest novel is a smash. No one could be prouder than his dutiful wife, Mrs. March, who revels in his accolades. A careful creature of routine and decorum, she lives a precariously controlled existence on the Upper East Side until one morning, when the shopkeeper of her favorite patisserie suggests that her husband's latest protagonist-a detestable character named Johanna-is based on Mrs. March herself. Clutching her ostrich leather pocketbook and mint-colored gloves, she flees the shop. What could have merited this humiliation?

That one casual remark robs Mrs. March of the belief that she knew everything about her husband-and herself-thus sending her on an increasingly paranoid journey that begins within the pages of a book. While snooping in George's office, Mrs. March finds a newspaper clipping about a missing woman. Did George have anything to do with her disappearance? He's been going on a lot of "hunting trips" up north with his editor lately, leaving Mrs. March all alone at night with her tormented thoughts, and the cockroaches that have suddenly started to appear, and strange breathing noises . . . As she begins to decode her husband's secrets, her deafening anxiety and fierce determination threaten everyone in her wake-including her stoic housekeeper, Martha, and her unobtrusive son, Jonathan, whom she loves so profoundly, when she remembers to love him at all.