When Bart gets a job as a menu boy for a Thai restaurant named You Thai Now, the menus he delivers are paper litter scattered about Springfield. Lisa is scared that the paper is a waste of trees. She meets Jesse Grass, the hunky and non-violent leader of a radical environmentalist protest group named Dirt First (a parody of Earth First), and joins the group after meeting him at a Krusty Burger, where he was arrested for protesting. When Springfield's oldest redwood tree is about to be cut down, she camps in the tree to prevent it being cut down. However, she leaves the tree for a night, and the tree is struck down by lightning overnight. After the tree is struck by lightning, everyone in Springfield thinks Lisa died in the storm. The Rich Texan makes an offer at first by making a forest on the site of the tree, but he changes his mind and offers to build an amusement park, "Lisa Land". Fortunately, Lisa comes to the site, and protests the park. The tree being used as the sign for Lisa Land is pushed down and heads for Springfield's business district, but eventually goes on a cross-country journey out to the sea. Although Jesse is in jail again, he has apparently not stopped his crusade for the environment.