Arthur and Muffy are paired up for a class project about an animal of their choice. They choose to report on a whale and go whale watching as part of it. While at sea, Arthur and Muffy rescue famous actor Wilbur Rabbit, causing Arthur to copy Muffy's uptight behavior. Arthur's friends try to get him to change back to normal by imitating his behavior during a baseball game, and Arthur decides to stop copying Muffy. Set at the same time as the previous episode, Sue Ellen and Brain choose to build a dinosaur model for their animal project. Sue Ellen wants to help, but Brain refuses to let her, paranoid that her model will be inaccurate. When Brain ends up doing the entire project by himself and neglects to use Sue Ellen's model, they argue and end up dropping Brain's model; Sue Ellen turns this into a dig site exhibit, which gets them a good grade. Meanwhile, Francine is paired with Buster, who avoids her so he does not have to work.