It is Bart's birthday. Homer buys him a "Superstar Celebrity Microphone" that sends sound through an AM radio. Bart plays a prank on the town with the radio. He throws the radio down a well and talks on the microphone, acting like he is trapped in the well.
A large crowd gathers to see the incident, they come to the conclusion that no adult could fit down the well to save "Timmy O' Toole" as it is to small. Soon a group of celebrities writes a song to raise money to save Timmy O' Toole.
However, Bart realizes that he left a "Property of Bart Simpson" label on the radio, and climbs climbs down the well to get the microphone. The rope breaks and he plummets in the well. He is now stuck in the well for real and admits his joke. However, the townspeople don't like this and leave him down in the well. Homer starts digging to save Bart, and soon the whole town joins and rescues Bart.