When college professor "Matthews" (Nicolas Cage) starts appearing in the dreams of strangers (oh, and his wife!), his whole life is turned topsy-turvy. Initially it's all a rather benign phenomenon with his appearances fleeting, inconclusive and harmless. Until, that is, he meets one person who has been having a rather more intimate experience. Not only does this meeting not go very well (on various levels!) but it seems to change the very nature of the illusions for everyone, turning them more into nightmares... A predictable, occasionally violent, backlash ensues which makes the man's life -...