1941, June 21...Tomorrow the most terrible war in the history of mankind will begin. And on this day, a stalker nicknamed Sniper appears on the border between the USSR and Germany, whom the will of the Monument transferred from the Chernobyl Zone to the past. He knows what will happen through several hours, but what can one person do against the deadly armada of the Wehrmacht - especially since here, at the Soviet border outpost, no one believes him? But Sniper would not be Sniper if he had come to terms with the situation. The war cannot be stopped, but you can save the lives of many Soviet soldiers, try to destroy the plans of the mysterious fascist organization Ahnenerbe, destroy man-made monsters in the underground of Chernobyl... and, perhaps, find out the secret of the Monument, which appeared long before the terrible accident at the Chernobyl nuclear power plant.