When Kermit, the new kid in school, gets infected by a green booger-like creature lurking beneath Harmony's forest, Tor Bough isn't too worried. But then Kermit starts acting really weird. For one thing, all he can think about is food and where to get more of it. And more. And more still. And for another, he can't wait for Tor and his friends to get infected as well. As more and more parents-and Tor's dog Tom -are turned into blob people, the thing starts growing bigger and bigger. Before long, half of Harmony has been infected and the giant booger has become as big as a house. Now it's up to Tor and his friends to try and stop this thing from taking over the rest of the town-or even the rest of the country