As Judy and the rest of the Virginia Dare Bookworms prepare for the Book Quiz Blowout competition against second- and third-grade readers, her team discovers the other group has a fourth-grader and worry about their chance of winning sets in.

"En clase de Ciencias, Judy se entera de la destrucción de los bosques tropicales, de que hay muchos animales en peligro de extinción y de que el planeta entero tiene seros problemas ambientales. Entonces, ¡lanza una cruzada ecologista! Y, como siepre, lleva las cosas hasta el extremo..."-- "When Judy Moody gets serious about protecting the environment, her little brother Stink thinks she is overdoing it, but she manages to inspire her third grade...