The episode beginswith Caillou and Rosie playing outside on a Fall day. They are having a lot of fun and don't even notice that Mommy and Daddy are watching them from inside the house. Mommy and Daddy then come out and play with them in the sandbox. Then it is time to go in. Caillou says it is one of the best days ever and stays outside while Daddy rakes the leaves and plays in them some more. They then go inside and later Caillou realizes that he has a leave on his head.