Fake medium Madam Blanche and her taxi driver actor boyfriend George make a living by scamming people with her phony powers. They are hired by an aging widow, Julia Rainbird, to find her nephew who was given away for adoption many years earlier to avoid a family scandal. Meanwhile, an extremely clever couple, diamond merchant Arthur Adamson and his attractive girlfriend Fran, are behind a series of kidnappings of various VIPs in the San Francisco area. The two couples paths soon cross and chaos results in Hitchcock's last film.—Col Needham