In 1960, a secret rocket launch took place, preceding the first manned flight into space. Cosmonaut Kim Kirillov's spacecraft is damaged before it can enter orbit. Having come to his senses, Kim realizes that he is in 2023, and apparently this is his future. It is difficult for him to accept the new reality, and he remembers almost nothing about his life before flying into space. His only memory is the image of a girl from the past whom he meets in modern Moscow. He knows her, but she doesn’t know him...