Fritz is in love with artist Glay, who stays at the Grand Hotel. In spite of not having any money he gets to know her, invites her to supper and after dancing a tango even hires the royal suite. How will he get out of this is a mystery even to himself.

When their relatives from the countryside miss the train to their wedding anniversary, Lawyer Dr. Helwing and his wife Dolly decide to go out together. Meanwhile, infamous burglar "Monokel-Fredy" enters the Helwing villa with some of his cronies, only to find out that the relatives have arrived after all.