The story opens with 10-year-old Tom Playfair being quite a handful for his well-meaning but soft-hearted aunt. (Tom's mother has died.) Mr. Playfair decides to ship his son off to St. Maure's boarding school--an all-boys academy run by Jesuits--to shape him up, as well as to help him make a good preparation for his upcoming First Communion. Tom's adventures are just about to begin. Life at St. Maure's will not be dull!