After convincing her overprotective brother to let her join the London Season, Beth Easton is finally entering society together with her friend and chaperon, Anne Blakeley. When attending the first ball of the Season she meets the spirited Willa Balfour, the daughter of a marquis, who has no intentions of meeting the Irish duke her father arranged for her. Beth agrees to switch identities with Willa and meet the duke in her stead. Although Beth is supposed to drive the mysterious duke away, she cannot help but grow closer to him. Now, Beth has a choice to make; continue with Willa's scheme or confess the truth. However, Beth is not the only one with a secret and the arrival of Melinda, the magical bookshop owner, raises questions for all.