In Africa, Professor Kenton has developed a superman formula which he has been using on the natives, hoping to build an army with which to conquer all of Africa. Premier Khufu resists the use of the drug on his people. Illya meets up with Harry Blackburn, a shady safari guide, and Marsha Woodhugh, who is searching for her lost sister, a Tarzan like woman named ""Girl"" who has captured Solo.