The book follows the story of a young raccoon named Henry who is excited yet a bit nervous about his first day of kindergarten. As he prepares for this big day, Henry goes through a range of emotions, from anticipation to apprehension, while his mother reassures him and helps him get ready. Upon arriving at school, Henry discovers a welcoming environment filled with new friends, engaging activities, and a kind teacher, which helps him overcome his initial fears and embrace the adventure of starting school.