While the Simpson family goes skiing, Marge remains at the ski lodge due to her fear of skiing, only to break her leg from a falling clock. As a result, while hospitalised, Marge leaves Lisa to deal with the slovenly Bart and Homer, who do nothing but take their toll on their house. However, in an attempt to motivate them, she pulls a prank suggested by the ghost of Lucille Ball on Bart and Homer by making it look like they have leprosy. At Ned Flanders' suggestion, Bart and Homer end up in Hawaii; with them gone, Lisa finishes cleaning the house as Marge arrives home, her cast off. The pair then go to retrieve Homer and Bart, who are enjoying themselves despite the shock therapy.