In a rip-roaring journey of peril and adventure, four explorers find a lost prehistoric world in the remote wilds of South America. Huge pterodactyls rule the skies and the jungle beneath is home to lumbering stegosaurus, carnivorous dinosaurs, and terrifying ape-men. If the adventurers can survive, then fame and fortune almost certainly await them back in London—but in this dangerous land that defies all science and reason, who knows what could happen?