The multi-millionaire Eduard Schlüter takes part under the name Schulze in a raffle of his own Schlüter works and wins a stay at the Grand Hotel. Disguised as a poor swallower, he would like to study the reactions of the hotel staff and guests. As an assistant, he takes his reliable servant Johann with him. Once there, he makes friends and also has cause for annoyance when his daughter and the housekeeper arrive.

Despite their social differences Luise, called Pünktchen, a girl from rich parentage befriends Anton, a boy who has to earn his own money in order to afford life for his sick mother and himself. Together they undergo different adventures, even preventing a theft in Pünktchens home