''Plain and mousy''—that was how Emmy Foster saw herself. A receptionist in London's St. Luke's Hospital, Emmy couldn't imagine why the very handsome Professor Ruerd ter Mennolt would take an interest in a girl like her. Ruerd couldn't figure out why, with a beautiful fiancée, he troubled himself with Emmy. Even more puzzling was why he invited her home for Christmas with him in Holland. But after he did, Ruerd couldn't help but wonder—was he engaged to the right girl?