In 1769, thirteen-year-old Maria Antonia Josepha Johanna, daughter of Empress Maria Theresa, begins a journal chronicling her life at the Austrian court and her preparations for her future role as queen of France.

While seeking the perfect dress for her friend's birthday party, twelve-year-old Louise Lambert dons a vintage gown and finds herself with a young Marie Antoinette in eighteenth-century France where, between cute commoner boys and glamorous trips to Paris, she finds that life in the palace is not all cake and couture.