Young and attractive archaeologist Diane Shannon intends to unravel the mystery linked to her father, who disappeared in Africa during the search for the "Tower of the First Born", a mysterious place that according to ancient legends would keep the secret of space and time, and would bestow knowledge and wisdom. Diane embarks on the journey ignoring the warnings of her friends and overcoming various dangers, clashing with a sheikh and his horde of savage desert marauders, and meeting the brave officer Léon in command of the foreign legion. Finally, together with Rashid, a mysterious prince of the desert and a friend of her missing father, Diane finds the mysterious place and her father.