Обещать - значит жениться

Count Derwent, the future Duke of Fairfax, is already engaged but discovers he cannot have children. Gabriel secretly hires the famous historian Etta Mason to research his genealogy in order to find a relative to whom he can pass on the title. Such a person is found in Austria. Gabe wants to see him, and to conceal the purpose of his trip from his family and the press, he invites Etta to travel with him as his fake girlfriend. However, Christmas in fairy-tale Vienna awakens ghosts of the past in both their hearts and... love?