The story unfolds in an industrial town where a young and charming literature teacher arrives, assigned to teach at an evening school. One of the boys from the metallurgical plant falls in love with the educated girl, but communication between the two young people turns out to be quite challenging.

Based on the novel by Natan Rybak “Soldiers Without Uniforms”. Director of a research institute engaged in research in the field of nuclear physics, Maxim Nerchin is testing a new research method. And although the method did not justify itself, Nerchin with unreasonable confidence began to build a more powerful installation... He uses almost all the institute's funds to create it and is so sure of success that he loudly announced it at a foreign symposium, thereby causing special attention to his institute on the part of those American circles who are primarily interested in creating weapons that bring death and destruction...

A group of musicians are trying to prevent the stealing of rare musical instruments in Russia during the twenties.