The Royal Waltz.

In 1852, the young Austrian emperor Franz Joseph persuades his friend, Count Michel de Thalberg, to act as a go-between in his love affair with the Bavarian duchess Elisabeth. Not long after his arrival in Munch, Thalberg has an embarrassing encounter in a public garden with an attractive young woman. The innocent incident is misinterpreted by a passer-by who, recognising the woman as the youngest daughter of Ludwig Tomasini, a highly respected caterer, persuades her father that she should marry the man who flirted with her to avoid a scandal (FilmsdeFrance).