The book tells the story of two young boys, Tommy Merton and Harry Sandford, who come from different social backgrounds. Tommy is wealthy and privileged, while Harry comes from a poorer family. Despite their differences, the boys become close friends and embark on various adventures together, guided by their mentor, Mr. Barlow.Throughout the book, Mr. Barlow imparts moral lessons to Tommy and Harry through anecdotes, fables, and practical experiences. These lessons cover a wide range of topics, including the importance of hard work, the value of friendship, and the consequences of dishonesty.