The film was an epic portrayal of the life of Catherine the Great of Russia.

Ilona, the bored wife of an easily distracted professor, falls in love with his friend Tibor, a world-traveler and ladykiller. Although she pursues him, he declines to take advantage of the situation, because she's married to his best friend. Only after her husband shows an interest in a co-worker is it possible for a happy ending to take place for the two new couples.

Hans, a young journeyman violin maker, meets and falls in love with Christel. But he has to go to Milan for a year. Before he leaves, the two get engaged. Christel's mother, who is against the union, intercepts Hans' letters from Italy.

The title alludes to the popular 1925 song I Lost My Heart in Heidelberg composed by Fred Raymond with lyrics by Fritz Löhner-Beda and Ernst Neubach. The film taps into the nostalgic reputation of Old Heidelberg.

In 1885, famous New York Metropolitan Opera singer Maddalena dall' Orto is scheduled to perform at a festival in the German residence of Ilmingen. It soon becomes obvious that she is non other than Magda von Schwartze, who left the town eight years ago against her father's wishes to become a singer.

Drama by Romano Mengon

Young Jan Bergwall visits his grandmother, the so-called centenary, at Woyland Castle. There he meets his cousin Andrea, who everyone calls "Fundvogel". Jan is fascinated by the young girl's beauty, and soon there is an erotic tension in the air between the two. Although they both have strong feelings for each other, they are afraid to make a commitment, even though their domineering grandmother is determined that they marry. Panicked that he might feel obliged to marry Andrea, Jan escapes from this place. Andrea is deeply disappointed and seeks revenge. Out of spite, she becomes involved with the falconer Bartel and is later raped in a wooden hut. The centigress, concerned about morals and customs, then sends Fundvogel to a convent. She escapes from there and flees into the arms of Jan. When he learns from a letter from the countess what has happened to Andrea, he leaves her a second time. In her despair, Fundvogel then throws herself off a bridge into the floods with suicidal intent.