The Ulam are a tribe of cavemen who possess fire in the form of a carefully guarded small flame which they use to start larger bonfires. Driven out of their home after a bloody battle with the ape-like Wagabu, the Ulam are horrified when their fire is accidentally extinguished in a marsh. Because the tribe does not know how to create fire themselves, the tribal elder decides to send three men, Naoh, Amoukar, and Gaw, on a quest to find fire.