Marilou and her classmates are going to put on a play at school. It's based on a famous fable by La Fontaine about a grasshopper and an ant. Marilou gets to play the grasshopper who sings all day long. But when she learns that the grasshopper is supposed to starve in winter after singing all summer, Marilou is convinced the famous French author made a mistake. Marilou and her friends decide to change the story to give it a new twist.

Translation of: Le grand rôle de Marilou Polaire.