Documentary about the Comedian Harmonists, a German vocal ensemble in the 20s and 30s.

The Comedian Harmonists sing various German folk songs in a picturesque landscape.

Simultaneously made French version of "Ihre Hoheit Befiehlt": An officer, posing as a deli clerk, and a princess, posing as a manicurist, meet at a ball. The court especially the prime minister oppose a marriage, for political reasons.

Willy, Jean and Guy are broke, so they sell their car and open a filling station. Then they all fall in love for the same girl. Simultaneously filmed French version of the German musical "Die Drei von der Tankstelle".