Nat arrives at Plumfield School and meets Jo and the other boys for the first time. The story introduces children from diverse backgrounds, each bringing their unique personalities and quirks to the group. As they navigate daily life, the boys experience pranks, conflicts, and the joy of understanding one another. Jo and the teachers encourage the children’s growth, uncovering their potential and teaching the true value of education. Sunday activities and playtime provide moments of pure joy and opportunities to develop problem-solving skills. Special events, like Daisy’s ball, create lasting memories for the children. Characters like Naughty Nan add humor and vibrancy to the story, making Plumfield feel lively and dynamic. This part is filled with episodes that establish a foundation for the children’s growth and set the tone for their adventures.

CHAPTER I. NAT
CHAPTER II. THE BOYS
CHAPTER III. SUNDAY
CHAPTER IV. STEPPING-STONES
CHAPTER V. PATTYPANS
“What's the matter, Daisy?”
CHAPTER VI. A FIRE BRAND
CHAPTER VII. NAUGHTY NAN
CHAPTER VIII. PRANKS AND PLAYS
CHAPTER IX. DAISY'S BALL