An elderly veteran dies in 2014, but his consciousness returns to himself 77 years ago, to the now so distant year 1937. He had a chance to live his life again, but how? You can simply stupidly repeat it, without making any attempts to change the course of time and fate, or you can try to change everything radically. You can try to save your large family, of which only he and his cousin survived during the siege of Leningrad. A chance to change the history of the war and save almost a million who died during the siege from hunger, cold, air raids and shelling of Leningraders. Can an ordinary person do this? You will say no. What if he is a tank designer who has been designing and building tanks all his life? What will happen if in the summer of 1941 the vaunted German Panzerwaffe collides in hot June and August battles with an armada of the latest LT-1 (T-50), T-28M, T-34M and KV-1M with the support of the infantry SU-76, anti-tank SU- 85 and assault SU-122 and SU-152, as well as various anti-aircraft self-propelled guns and armored personnel carriers?