It's Halloween morning -- and Nancy Kincaid is about to discover that she has disappeared.When she arrives at her office in one of New York's top law firms, she is feeling tired and a little ill. This day is going to be a nightmare, she thinks.It begins when a secretary challenges her: Excuse me, Miss. What are you doing here? This is Nancy Kincaid's office -- and you're not Nancy Kincaid.With mounting fear, Nancy realizes that no one recognizes her anymore. Her coworkers look at her and shake their heads blankly. Her boss threatens to call the police if she doesn't get out. Soon she is alone on the streets of New York City, searching desperately for the life that has been pulled out from under her. She has only one clue: a weird, insistent little voice whispering in her ear that someone is going to be murdered that night -- and that she has got to find out who by eight o'clock, by the Animal Hour.