Carol Reed directs this comedy drama in which jealous husband Charles (Michael Jayston) hires private investigator Julian (Topol) to follow his wife and uncover her alleged affair. Things begin to backfire, however, when Belinda (Mia Farrow) becomes aware of the strange man following her and starts to enjoy the thrill of the chase. Can Charles find a way to win back the love of his life or will he lose her to his own paranoia?