The kids of Springfield Elementary School are tasked to sell chocolate around Springfield. Before Lisa starts selling, she goes home to watch a Mars Rover. Homer drives her to Shelbyville to sell chocolate, as everyone in Springfield has bought some. Meanwhile, Bart ends up at a collector called Cornelius Morgan, who reveals he is giving his collection to a nerd in Springfield. On the road, Homer takes a shortcut across the desert, and runs over the Mars rover, which is being faked. When no one looks, Homer carves "Homer Rules" into the dust which appears on live television and is claimed as natural erosion. Meanwhile thenerds are doing everything and being filmed by Kent Brockman as news. After a week, Morgan announces the result that the winner is, in fact, himself. He reveals that he was making a mockumentary movie, with Brockman helping. One strong nerds hits a rocket firing robot, which destroys Cornelius's house and sends the collection scattered over town which causes everyone to collect all of the comic book stories.