The Earl of Derwent, the future Duke of Fairfax, is already engaged, but learns that he cannot have children. Gabriel secretly hires renowned historian Etta Mason to research his genealogy to find a relative to whom he can pass the title. Such a person is found in Austria. Gabe wants to look at him, and in order to hide the purpose of his trip from his family and the press, he invites Etta to go with him as his fake girlfriend. But Christmas in fabulous Vienna awakened in the hearts of both the ghosts of the past and... love?