Lisa enters an essay contest in Reader's Digest and wins a all expenses paid trip for the whole family to go to Washington, D.C. While staying there she explores the building she sees a congressmen taking a bribe for cutting down the Springfield National Forest.
She is stunned and starts to lose faith in democracy. She shreds her old essay and prepares a new one exposing the scam to the public during the contest. Everyone is surprised and of course she doesn't win but she goes home feeling she has done the right thing.