With the breakup of her marriage and the death of her daughter, Hilary Craven flees England and escapes to Casablanca with the intention of taking her own life. However, fate intervenes in the shape of Mr. Jessop, who enlists Hilary's help to find out why some of the world's top scientists, physicists, and chemists have disappeared without a trace. Taking the place of Olive Betterton, wife of one of the missing scientists, Hilary ventures into areas of unimaginable excitement and danger. She will need to use all her powers.