Homer and Bart are watching the Warner Bros. Network on television when they are interrupted by Lisa playing her saxophone in her bedroom. Bart enters Lisa's bedroom and tries to grab the saxophone from her, but he inadvertently tosses it out the window. It lands in the middle of the street and is run over by traffic and stomped on by Nelson Muntz. In a period of mourning, Lisa reveals she cannot remember ever "not" having that saxophone, so Homer recounts the instrument's origins.