The house is hot and sticky, and the Simpsons do not have air conditioning. Lisa has no place to practice her saxophone and it ends up being destroyed. Lisa asks the family to tell about how she originally got the instrument. In a flash back to 1990, Bart is having trouble in school. Homer and Marge go to talk to the school counselor and they bring Lisa along. The counselor notices that Lisa is a child prodigy. They look for a preschool that will help develop Lisa's gifts. Finding them too expensive, Homer gets her a saxophone instead, using the air conditioner fund. After telling the story, Homer decides to take the new air conditioner fund and buys her a new saxophone.