One very unusual person pays an unexpected visit to an old friend who considers him dead for more than half a century. Together they are preparing an experiment to influence history, and with perfect practical goals. And the main object of the experiment is the great space race, which began in the middle of the 20th century. What if C. P. Korolev even before the first launches knew about the children's diseases of the "seven" and did not lose two years and dozens of dead devices? What if Glushko was wounded among his comrades-in-arms? What if he could put a board computer on the Soyuz, or even on earlier ships?