Paleographer and writer Anton Glebovich Kosmich finds in the binding of an ancient book a parchment with encrypted information about treasures hidden in the dungeon of the castle. It gradually becomes clear that the last scion of the family of the Olshansky princes, who collaborated with the Nazis during the war, is also looking for the treasure. In the dungeon of the castle, along with treasures of the 17th century, materials from the SD archive are also hidden. The spaceman is in mortal danger.

After the death of her mother, little Olya lives alone with her father. One evening, a girl hears her father inviting his beloved girl Sveta to stay with them forever. But she offers to send the girl to a 24-hour kindergarten so that she does not become a burden for them. Olya asks the teacher Varya what this word means? Olya is very attached to her teacher and she would like to see her as a new mother.