After the Springfield Isotopes win the league championship, Homer, Barney, Carl, and Lenny go on a bender in which they drunkenly trash Springfield Elementary. The children of Springfield are blamed for the vandalism, and a curfew is put into effect.

When Bart and Lisa see an ad for the film The Bloodening, they decide to sneak out with their friends and see it. The film features strange children who read adults' minds, reveal their secrets, and make them hurt one another. When the children of Springfield are busted by Chief Wiggum, they strike upon the idea to reveal the secrets of the adults of Springfield. They broadcast a pirate radio program called "We Know All Your Secrets" and threaten to have the show on every night until the curfew is lifted.

The police trace the location of the children's secret broadcasts to their very own billboard. The adults of Springfield face off with the kids of Springfield, each voicing their complaints to one another in a rousing musical number. Soon, the senior citizens of Springfield arrive, breaking up the confrontation. They go on to enact a curfew that keeps everyone under seventy inside after sundown.