The story follows a resourceful adolescent who, while working with telephone messages and temporary odd jobs, becomes entangled in the mystery of a cryptic communication that leads to theft accusations and missing papers. He and his acquaintances pursue clues, confront deceit and danger, and uncover the scheme behind the message. Chapters trace his suspicion, accusation, flight, and eventual vindication, ending with recognition and promotion. The narrative emphasizes quick thinking, loyalty, and moral perseverance as the boy unravels the puzzle and clears his name.