Trapper Nat Coleman and government agent Ted Arnold come upon a plot to take over an African nation. Its leader, Caliph Abdul el Hamid, has been exiled from his country and replaced by a look-alike usurper allied with an unnamed foreign power. The Caliph intends to return but enemy agents Boris and Greg are out to stop him. Captain Africa a masked jungle lord, appears occasionally to aid Nat and Ted.—GusF