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.” The closest entry point to Berlin from the USSR border was an airfield on the Estonian island Saaremaa in the Baltic Sea. It would be a 7-hour flight over enemy territory in outdated aircraft leaving no chance of survival for the tail crew members in case of attack. Despite overwhelming odds, the first units completed the mission and made it back to base safely, unlike many others that followed.

Russia, the late 19th century. As the threat of war with Great Britain looms, a mysterious device—a mechanical flea—is discovered within the Imperial Palace. Tasked with investigating the incident is a young officer, Pyotr Ogaryov, who dreams of earning the trust of Tsar Alexander III. In his quest for the truth, he joins forces with Lefty, a brilliant but forgotten master craftsman from Tula. Together, they plunge into a world of intrigue and danger. To uncover a conspiracy, the two heroes must challenge the established order, unravel family secrets, and make a difficult choice between duty and passion. The security of the nation—and their own destinies—hang in the balance.

By the middle of the 12th century, the borders of the Mongolian Empire stretched from the Adriatic and Mediterranean Seas in the west to the southern lands of China in the east. The Mongolian army, under Khan Batu’s command, was known for its invisibility, destroying anyone who dared to challenge them. Yet, even within their central territories, some areas refused to bow to the Genghisids. Kozelsk was one of them. The Mongolian armies bypassed the high walls of this small town, considering that "the skin of the wolf was not worth the risk of encountering its teeth".However, one of the Khan’s commanders harbored a grudge against the town's citizens. Now, the people of Kozelsk must face a battle against the strongest army in the world, with no hope of victory. This is a story about people facing their death. Some try to escape, others are willing to do anything to survive, but most are prepared to protect their city from the relentless storms of the Mongolian hordes.