Abigail Clayton lives alone. Very alone. In fact, the attractive heiress has not left her Manhattan loft apartment for almost two decades.During years of self-imposed isolation, Abigail has had contact with only two people - her building's Concierge, Klandermann, with whom she communicates via notes, and Dr. Raymond Fontaine, a longtime family friend and her sole confidant for most of her life. When the death of her elderly neighbor prompts NYPD Homicide Detective Frank Giardello to launch an investigation, the agoraphobic Abigail is distressed to find him outside her door, asking to question her.