Fred and Luisa find themselves in trouble once again when the new student mixes up recipes at their class's bakery field trip, leading to snakes running amok. While the students scramble out of the school in fear, Fred and Luisa suspect their old friend Frank is behind the Great Cupsnake Escape. Once again they put their creativity, their cooperation, and their courage to the test—but will it be enough to save the school from the snakes?