The Bird-Men, a tribe of people hunters, pursue a young caveman named Goom-wah through the jungle. Before Dino Boy and Ugh rescue him, the duo decide to escort the pygmy back to his own tribe through a treacherous river route. After deadly encounters with roaring rapids, giant water moccasins, giant bees, and a tribe of Snake People, the tribe barely make it to Goom-wah's village and back home with their lives. Ugh carries an exhausted Dino Boy home where they are met by Goom-wah, who thoroughly enjoyed himself and wants to know when they can do it again.