The plot structure of the film is based on a commonplace situation from the practice of foreign trade organizations - the conclusion of a trade agreement with a foreign company.
The ten-graders Gosha and Zosya are in love with each other. The last school waltz has been played and it seems nothing stands any longer in the way of the young people being together. However, getting the news that he’s going to be a father soon, Gosha chooses a “free life” and… marries...