Now an inspector of the Air Police, Biggles runs across his old enemy von Stalhein once again - in the heart of the African jungle. Biggles is on the tail of as wicked a bunch of thugs as he'd ever encountered. In some mysterious fashion, they are bringing down planes carrying high- ranking military personnel who are in possession of top secret military knowledge. Biggles has to find out first how it is done and then - how to put a stop to it. Rogue rhinos, poisonous mambas, hungry lions and spear-happy tribesman aren't exactly helping, either!