The year is 1941. Nazi Germany has declared war on the USSR and begins launching air assaults on Moscow and St. Petersburg. Stalin immediately orders a retaliatory air campaign under the code name "Wings over Berlin". It is a 7-hour flight over enemy territory in outdated aircraft leaving no chance of survival for the crew members in case of attack. Despite the overwhelming odds, the first units completed the mission and made it back to base safely, unlike many that followed.