When Anatole's children yearn to taste the unique cheeses of France, Anatole and Gaston attend the human International Cheese Festival in Paris. There they learn that the famous Duval Cheese factory is about to close because of producing inferior cheeses.

Anatole and Gaston visit the factory and, while fighting off the factory cat Charlemagne, discover that Duval's cheese recipes are not accurate and that the milk supplier has been selling Duval old, nearly sour milk. By leaving notes about this to Duval, Anatole anonymously corrects the Duval factory cheese problems and is offered a job as Duval's Vice President of Cheese Tasting.