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.
A son, in defending Prussia circa 1814 under the thumb of Napoleon, washes away the disgrace of his aristocrat father who had collaborated with the French and caused the deaths of countrymen.
A shoemaker has delusions of grandeur when he inherits from a baron whose life he saved.He prevents his daughter from seeing a mere carpenter, abandons humble old friends, and shows poor judgment by falling for a couple of poseurs.
