Sasha Larionov, is in the eighth grade and still doesn't know that his mother has left the family. Sasha's father, a decent and very honest person, was used to telling people only the truth. But here he doesn't now how to tell his son that the mother left them for another man and therefore explains her long absence from a long business trip. However, soon Sasha finds out the truth and decides to go after his mom, hoping to get her back

Having lost her parents during the war, Galya was brought up in an orphanage. When the grandfather was rehabilitated, they began to live together. Galya often called Alyosha to repair the phone. After walking around Moscow at night, they realized that they loved each other. Once, after another call, Aleksei was slandered. The boss, not wanting to delve into the essence of the client's complaint, invited Aleksei to apologize. The guy refused — and he was fired from his job. Friends helped him find another job, but he could not convince Galya that he was right. The girl reproached him for cowardice — and the heroes quarrelled...