Parents of thirteen years old Lena just got divorced. Lena wants to prove that they live nicely even with her mother alone and that she is independent. The girl goes to work at post office utilizing there her resourcefulness and charm. At work everyone talks about a serial killer who keeps the entire region in terror. One night a stranger defends Lena from some hooligans and as Lena thinks, he continues assisting her incognito. The girl is ready to believe and convince others that her protector is that horrible maniac. At first, these relationships with her odd admirer seem as a gamble for Lena, but then she gets convinced that this game became deadly dangerous...

"Male students are not allowed to enter the female dormitory." This sign hangs at the entrance, but the men's still climb into the Windows. Seeing this craving for beauty, the authorities of the provincial town decided to improve the financial situation by opening a brothel, while maintaining the chastity of the fairer sex…

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.