A small village is having a difficult time growing and harvesting its crops. In a nearby castle, a professor hopes to become rich by creating a potion that makes things grow big. One night, while tasting the potion, the professor's pet spider begins to grow and grow, and grow! Threatening to destroy the village in search of food, the villagers storm the castle demanding the spider be stopped. Can the professor find a way for his pet spider to help the village and live happily ever after?