Caillou, Dad and Rosie are in the car on their way home. Caillou and Rosie are in the back seat arguing and Dad is losing patience with them. When the car breaks down they have to pull over. Caillou comforts Rosie who becomes afraid when smoke comes out of the engine. Caillou is overjoyed when the tow truck arrives. Everyone rides to the garage and Caillou is in charge of holding Rosie's hand and explaining all the scary sounds.
