The new fast-moving thriller from Dean Koontz is the story of an innocent man forced by a serial killer to choose who will be murdered next. William Wiles is an easygoing thirty-something, a bartender who lives a quiet life alone until a serial killer singles him out - not to kill him, but to force him to decide who the next victim will be. On his SUV Billy finds the first note: 'If you don't take this note to the police and get them involved, I will kill a lovely blonde schoolteacher. If you do take this note to the police, I will instead kill an elderly woman active in charity work. You have four hours to decide.