Chuck D. Head, a headless mummy created by mad scientist Dr. Frank N. Stein and his assistant Igor, is sent to defeat Max D. Cap, a demon who has returned from the Underworld with his army of monsters to conquer the surface world, splitting a skeleton-shaped cluster of islands into pieces in the process. After reforming the scattered islands to normal and defeating Max, Chuck sluggishly returns home, where Stein rewards him by transforming him into a real human.