It is late summer on the bayou, and Clovis Crawfish and his wetland friends are sad because soon summer will be gone. Christophe Cricket chirps sadly, "Je suis triste, je suis bien triste, parce que l' 1/2t 1/2 est pass 1/2," which means "I am sad, I am so sad, because the summer is over." Sadness overcomes the bayou friends because it is time for Bertile Butterfly to leave. She must fly south for the winter with the other monarch butterflies and cannot stay in the bayou much longer. To wish Bertile bon voyage, Clovis and friends throw a going-away party to wish her farewell.
But when a cool north wind brings a pinecone spinning down from a tree, pinning Bertile's pretty wing to the ground, the friends must help her save her wing and get her started on her way.