While detained in one of the Soviet Gulags (prison work camps), Maria fell in love with and had a child by one of the camp guards. However, in order to save her baby, she was manipulated into a situation where she had to betray her lover. The main attraction of this film is the clear depiction it gives of the harsh conditions of life in these infamous camps.

Shortly after a daring jewelry store robbery, two murders occur in the city. An experienced investigator suspects that there is a connection between these crimes. But there is no proof. At the same time, the gang leader not only does not think of hiding, but calmly communicates with the investigator in the vacation home. He is sure that he has subtly calculated all the moves, and therefore he is invulnerable.

Nina, a young girl from Moscow, suddenly decides to accompany her new friend Anton to Siberia in order to participate in the building of the railroad...