As the new school year begins, Happy Hazel and Jolly Jim are excited to start a new year of adventures as school bus drivers in Treetown. Happy Hazel and Jolly Jim take pride in their jobs and always do their best for the kids on their buses. They take their jobs seriously and expect the kids on their buses to always be respectful and kind. When Happy Hazel and Jolly Jim make the trip to the school bus garage to pick up their buses, they are in for a surprise. A new student will begin riding the bus on the first day of school. Happy Hazel wants to make sure that the new student feels welcome, accepted, and safe.