Diane, a young and attractive archaeologist, gets to know Dr. Neal Hogan in the secret archives at the Vatican. Both of them are interested in the great mystery that Diane's father, the famous scientist Dr. Shannon, must have uncovered in Africa -- because since that time her father has not been seen by a living soul. Nevertheless, Diane is absolutely convinced that her father is still alive: he was looking for the "tower of the first born", which according to ancient records is supposed to lead to "great wisdom". Ignoring her friends' warnings, Diane decides to travel off in search of her father and find the legendary tower. Also in search of the monument -- which has contained secret knowledge about space and time for millennia -- are a sheik's horde of wild desert riders, as well as a heavily-armed group of soldiers under the command of the brave officer Léon. Together with her protector Rashid, an mysterious prince of the desert and old friend of her father's whom she knows from her youth, Diane withstands great dangers, and finally comes face-to-face with her missing father...