Rumors circulate about Sue Ellen Armstrong and her family, who have just moved into the neighborhood. Buster jumps to the false conclusion that they are aliens and tries to expose them, but everyone else learns about how Sue Ellen traveled the world and change their opinions of her. Brain spends the weekend with the Reads while his parents visit an ice cream convention. Brain is neat, finishes his homework early, and reads to D.W., making Arthur look bad. When Brain invites Arthur over to his house, Arthur learns that Brain is not neat and was just acting polite because he was a guest.