One of the six sparkling Mitford sisters, known for her quips, her style, and her green eyes, Nancy Mitford privately endured an unfaithful husband, two sisters with Nazi sympathies, and no hope of motherhood. In 1938, with war imminent, she finds respite in a job at the Heywood Hill Bookshop in Mayfair, and discovers a new life. Nine decades later, book curator Lucy St. Clair lands a gig at the same storied shop, bringing along a first edition of Nancy's book with an odd inscription from the author—and soon discovers that her life and Nancy's are intertwined.