About the adventures of two princesses who received rings from the wizard Almanzor as a gift. The problem was that one of them was too stupid and the other was too evil. It was difficult to find suitable husbands for them. Almanzor offered the princesses two rings: a regular gold ring and a magical tin ring with a twin. Aleli chose the tin ring, and the gardener who received the second tin ring knew everything about his beloved and did everything he could to make her happy.

Several major robberies take place in Leningrad and the region, but the criminal leaves no trace. The Inurkollegia announces that the administrator of the boarding house "Otdykh" Balyasin unexpectedly receives a large sum of money as an inheritance, and the police decide to set a trap for the criminal, believing that he will not pass by such money. An employee of the Criminal Investigation Department arrives at the boarding house, and it soon becomes clear that the elusive criminal is one of the vacationers at the boarding house.