Can one person, if returned to the past, change the history of at least one country, having all the knowledge of today? "I would undertake, but who will offer," says Andrei Sokolov, our contemporary. "Just like that, would you drop everything and take it?" - the fellow traveler does not believe.... And now Andrei finds himself in the late seventies, in his own body as an eighth grader of the Leningrad school. Nobody set specific tasks for him, did not give instructions. He himself will have to decide what to do: knowing about the upcoming collapse of the country, have time to find a warm place on the globe, since there is an opportunity, or still stay and try to influence the course of the historical process and save the USSR.