Hilary Craven has lost the will to live...Mrs. Betterton is already dead...Then Hilary is asked to impersonate the dead woman and to trace her husband - a vansihed nuclear scientist - and her will to live returns. A faked air disaster, a string of radio-active pearls, a leper colony floundering in the dry heat of the Morroccan desert - all lead Hilary to a terrifying discovery - and her new found enthusiasm for life evaporates into ice-cold fear...