Bilbo Baggins, a respectable, well-to-do hobbit, lives comfortably in his hobbit-hole until the day the wandering wizard Gandalf chooses him to take part in an adventure from which he may never return. He becomes a thief for a band of dwarves and soon finds himself in the midst of a war with the evil goblins and wargs, and is forced to make a decision between the call of duty and the pull of the simple life.

When their father is sent away to prison, three London children move to the country where they keep busy preventing accidents on the nearby railway, making many new friends, and generally learning a good deal about themselves.