As a young man, mustard manufacturer Ludwig Klinke had an affair with a dancer, the “Spanish Fly”. The dancer had a son and Klinke has been secretly paying maintenance ever since. Wimmer and Tiedemeier also had a relationship with the dancer. With the appearance of the dancer's supposed son, Heinrich Meisel, chaos breaks out.
Unfortunately the movie The Spanish Fly is not yet available on Disney Plus.
| Editing | Paul May | Editor |
| Camera | Karl Löb | Director of Photography |
| Camera | Willy Winterstein | Director of Photography |
| Writing | Ernst Bach | Writer |
| Directing | Georg Jacoby | Director |
| Writing | Franz Arnold | Writer |
| Writing | Siegfried Philippi | Writer |
| Sound | Jean Gilbert | Music |