The film takes place in 1921 on the Soviet-Finnish border. Shyutskorov detachments broke into Karelia, killed Soviet activists, burned houses ... In the rear of the enemy with a special task - to destroy the headquarters of the White Finns on the Kimas Lake - a detachment of Soviet cadets under the command of Toivo Antikainen (Oleg Zhakov) was sent.

After news of the future birth of a child, Sergei split from his wife, Natasha, and settled in the company of young architects, who occupied a room in a big house. As a result of a chain of unforeseen events, brought by one of the tenants found a child, Sergei finds a newborn son. Friends are doing everything possible to find a lost mother, but Sergei does not disclose their affiliation and tries to give the baby the wrong hands.

Central Asia during the Civil War. The Jarkent battalion of the Red Army, located in the Verny (now Alma-Ata), receives an order from Frunze to go to the Fergana region to fight the Basmachi. A group of kulaks, with the support of local merchants and beys, incites the unconscious, wavering mass of the Red Army to revolt. The anti-Soviet agitation of counter-revolutionaries, demagogically exploiting the mood of war weariness, provokes an open mutiny in the battalion.