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.
Pastor Schönhoff
Sophie
Rudolf
Charolotte
Fritz Merkelbach
Alex Winkler
Georg Schröder
Klärchen
Engineer Frank
Trude
Bornschläger
Master tailor Stenglein
Fritz Merkelbach