About a young girl who came to a distant land for geological practice.

The very first work of a young scientist Igor Panteleyev caused a sensation. Not surprisingly, they are interested in foreign intelligence. Soviet security officers are taking measures to protect the scientist. The name of Panteleyev disappears from the pages of newspapers and magazines. The scientist is transferred to work in another research institute, changing his surname to Evdokimov. But due to chance, foreign spies found a researcher.

An endemic fever arose in the large Siberian construction area. Four scientists involved in the development of a vaccine against this disease, and whose laboratory was threatened with closure, are sent to the center of the outbreak. They manage to find the cause of the infection and create a vaccine.

A man from a poor noble family named Aldemaro falls in love with the daughter of a rich gentleman. He comes up with a pseudonym and introduces himself as a dance teacher in order to get into their house.