Before Harry leaves home for his first day of school, his parents remind him to be nice to the new students in his class. When Harry sees a boy sitting alone in the auditorium, he introduces himself while the other kids stand at a distance making fun of the boy's stutter. Harry and Luke become great friends, despite the other kids' teasing. Harry Humble helps children understand how a simple act of kindness can change lives for the better. Through Harry's actions, children see how the compassion given to others comes back to them.