Dr. Ortega and his assistant Carmen are hit with a shrink ray and captured by the Skullmen of the swamp, who want the archaeologists' help in finding the ancient tokens that gave the Skullmen's ancestors super powers. The gang tries to rescue Dr. Ortega and Carmen, but in the attempt they too are shrunk and imprisoned in a metal cage. With Fangpuss' help, they escape, and they have to find a way to rescue the archaeologists and return themselves to normal while avoiding giant sized dangers.