Polly Milton loves music, old things, pretty, but simple frocks, her wild brown curls, books, a good sled ride, peanuts, a being a little girl. All at age 14. Her Best friend Fanny is 16 and far more concerned with "men", and parties and Bronze Boots. So when Polly comes for a long visit to Posh Boston, her "countrified" ways are not looked well upon. Except for by Grandma, Fanny's grandmother, who takes a keen liking to Polly and her "old fashioned ways", and to some extent Tom, Fanny's "bear" of a brother. But even the huge and uncomfortable contrast in their lives does not dampen Polly's influence on the family, and she manages to bring some sunshine to a rather gloomy lot.
Well at least that's the beginning of the book.