Miss Caroline Holbrook, the granddaughter of the Marquis, is a girl who does not tolerate pressure and outdated prejudices. Life, limited by the boundaries of secular decency, seems unbearably boring to her, and the prospect of a respectable marriage of convenience does not at all excite her. Caroline's aunt does not lose hope of making her niece a socialite and invites her to London, where the ball season is just opening. The appearance of Caroline creates a real sensation in society. Her cheerfulness, sincerity and provincial naivety attract the attention of Sir Frederick Rathbone, one of the most eligible bachelors in London. Meeting him changes Caroline's life, filling it with new meaning. But will she be happy next to this man?