Andrei Kireev, an officer of the Russian army, after a car accident falls into the past, on the eve of the First World War. He is trained at the Gatchina school of military pilots and goes to serve in the flight detachment of the Osovets fortress. Combat aviation is taking its first timid steps. Fragile storeys with unreliable engines have yet to become one of the most destructive military branches. Single aerial skirmishes from pistols of the "noble knights of the sky" will quickly be replaced by fierce battles of dozens of airplanes using bombs and rapid-fire machine guns, engine power and aircraft speed will sharply increase. Andrey trains hard, mastering aerobatics - those techniques that will be invented only after a few years of carnage. Will the young officer be able to turn the tide, replay the lost war?