This is the story of the thrilling adventure of two boys while hunting wild game in German East Africa. The wealthy father of one of the boys provides them with money for the big hunt. They go to Mombasa, procure an outfit and plunge into the jungle, where they become involved in a lot of adventure. They are captured by savages and have many hairbreadth escapes from death. Finally they find a gold mine and the real source of the Nile, down which they return home. The story is as exciting as any boy could wish.