James Bond (Sean Connery) investiga o desaparecimento de um agente britânico. Em meio às suas investigações ele descobre o esconderijo do Dr. No (Joseph Wiseman), um gênio louco que pretende desviar o rumo dos foguetes americanos.
Peter Chance (Lex Barker) suffers a blow to the head and wakes up with amnesia in a luxurious home, where a doctor and several women tell him he's a missing heir who's inherited millions. But Peter soon suspects something is not quite right with their story. He sets out to learn the truth before he's forced to sign a document that purportedly finalizes the transfer of the estate. This drama is based on Hugh Wheeler's novel Puzzle for Fiends.
An insurance investigator tumbles onto a series of similar deaths, by brain hemorrhage, of patients of a psychiatric clinic in France where therapy involves a device which can implant visual imagery in the minds of patients, ostensibly to help them relax.
