A prince has a romance with a barmaid before he must give up personal happiness for duty.

When his bride-to-be finds him much too stiff, heir to the throne Prince Karl is sent off to the university in Heidelberg to learn how to socialize. He makes friends with the students there and falls for the down-to-earth Kathie, a barmaid. The two are soul mates, but when Karl's grandfather the king falls ill, he must choose between his country and his own happiness...—cupcakes