This is an adventurous novel that revolves around Waldo Emerson Smith-Jones, a Boston-bred blue-blooded Mama's boy, and Nadara, a cave princess. Waldo is swept overboard during a South Seas voyage and finds himself on a jungle island. He isn't prepared for his surroundings and becomes terrified of the ape-like men he encounters in the jungle. There he meets the cave princess, Nadara.