Half-sisters Jane and Christina Richmond are like chalk and cheese, but they adore each other nonetheless. Jane, is light-hearted and impulsive, whereas Christina, the elder, is quiet and reserved, with modest expectations. Jane's fortune wins an advantageous arranged match with Robert, Lord St. Clement, and the sisters and their widowed father travel to Bath for the betrothal. Things soon go wrong as Jane is lured into folly, thanks to the dashing American balloonist, William Grenfell. As the future Lady St. Clement makes an exhibition of herself above Bath's rooftops, Christina is obliged to scurry around trying to save Jane from herself. Meanwhile, Christina has growing feelings for enigmatic Lord St. Clement, whose attitude is strangely ambiguous. Is she fated to forever remain the wrong Miss Richmond?