After watching a TV show, starring Captain Heifer and his Heifer Farms Brand Yoghurt, Billy asks Grim to turn him into a superhero with the power of squeaking and throwing yoghurt from his armpits. Then, with his wish granted, Billy goes to outer space to fight the Evil Empire, but the planet he visits is mostly inhabited. At home, despite being free of Billy, Grim still has to deal with Billy's equally dumb father, Harold. In the end, after Billy fills the alien planet with yoghurt, he returns home to be "normal".