Sinister story of mind control. Amiable old professor Marcus Monserrat develops a method by which a subject can be hypnotised and have their mind 'captured' so it can be controlled remotely. Marcus and his wife Estelle entice a bored young man, Michael, to their house and use the device on him, discovering that, once he has been processed, they can experience the same sensations he feels. Estelle is immediately hooked and becomes obsessed with the vicarious pleasures she can experience.