He (eventually) slips into the social mix, becomes accepted as a "good chap" by his student peers, and falls deeply in love with Kathie, a pretty, popular, and musically inclined barmaid, who holds "court" in the local biergarten. Love notwithstanding, when his old grandfather dies unexpectedly, the young prince must marry the princess and take his place in the small kingdom that he is destined to rule. He returns for one last time to Heidelberg to bid Kathie a poignant farewell.