Sergey Khromov was a simple student with typical worries and problems. And nothing foreshadowed trouble until he grappled with the wrong people... But instead of expelling the guy from the institute or reprimanding him, Sergei is offered some kind of job with very good pay. In return, only his consent to participate in the experiment is required. It turns out that the world in which Sergei Khromov lives is far from the only one. There are many of them, and in some our history is almost completely repeated. And you can influence its course if you understand what levers to pull. This is what Sergey has to do. He turns out to be in 1941. World War II is in full swing. Will he, once a simple student, change the past? And if so, will the hero be able to return home alive?