Yuri Korzhov

The civil war in Russia, guerrillas fighting with Kolchak formations. As a result of sabotage, accident with white Russian train takes place. In disaster area the flag with the inscription "Wagtail's Army" is found. Kolchak commanders think that they are Bolsheviks, but guerrilla leader does not know anything. It turns out that this is work of three boys.

Disguised as a wealthy businessman, Red Army intelligence agent Platais arrives in a city held by the White forces with his companion Miks. Their mission is to reach a railway station and, with the help of partisans, sabotage the tracks. As Platais gathers vital information by befriending Lieutenant Colonel Sviridov, Cielaviņa and Čigāns build an unexpected alliance with a group of homeless people. Through courage, ingenuity and the help of his unlikely allies, Platais sets out to disarm the White officers and complete his dangerous mission.