Marianna Grantham's parents are determined to buy their way into society through their daughter's marriage. Marianna hears of Truesdale Sinclair, the Viscount Trowbridge, who is last in a long line of aristocratic rakes and reasons a sham engagement will keep her parents at bay long enough for her to meet her true love. But "True Sin" is a reformed rake, and he learns Miss Grantham is not the social climber he took her for.