Anatole and Doucette have decided to take a much-needed vacation to a big cheese festival in Switzerland, and Gaston is left in charge of the children. In between snacks, he manages to show Claude why he shouldn't take shortcuts with his homework.

Meanwhile, Anatole and Doucette's holiday doesn't turn out to be restful at all. During the train ride to Switzerland, Duval's cheese for the competition is stolen from his briefcase! Anatole dons a clever disguise to discover the identity of the culprits. After a showdown with the malevolent rat J.P., Anatole, Doucette and Pamplemousse get the upper hand and show him that cheaters never prosper!