Louise Lambert's best friend's thirteenth birthday party is fast approaching, so of course the most important question on her mind is, "What am I going to wear?!" Slipping on an exquisite robin's egg blue gown during another visit to the mysterious Traveling Fashionista Vintage Sale, Louise finds herself back in time once again, swept up in the glory of palace life, fancy parties, and enormous hair as a member of the court of France's most infamous queen, Marie Antoinette.

But between cute commoner boys and glamorous trips to Paris, life in the palace isn't all cake and couture. Can Louise keep her cool-and her head!-as she races against the clock to get home?