The diminutive Zeno uses his hypnotic ring to take control of the mysterious Filipino Cavemen, using the ancient strongmen to steal Professor Battack's newest invention: a power energizer that can make any man ten times his normal strength. Using the energizer on his caveman slaves, Zeno escapes to his secret airplane hangar, but he didn't count on the ingenuity of Fangface and his friends. Disguising themselves as cavemen, Fangface and Puggsy infiltrate the hangar with Fangpuss hidden in a spring-loaded club very similar to that of Captain Caveman, but Zeno is not so easily fooled.