The great somnambulist, Professor Montserrat, (Boris Karloff) has spent a life’s work developing a technique for controlling peoples` minds and sharing their feelings and sensations. With his wife Estelle (Catherine Lacey) they decide to test their method on Mike Roscoe (Ian Ogilvy) and enjoy the hedonistic kick of `being` young again. But then Estelle grows to love the power of controlling Roscoe as the extent of his vicarious pleasures expands and how far will Professor Monsterrat allow her to go before they upset the equilibrium of humanity?