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.
A kids from "Armiya Tryasoguzki" are fighting "whites" again.
Summer, 1940. Foreseeing the collapse of the Ulmanis regime, the owner of a ship sailing off the coast of Latvia decides to flee the country. Subsequently, the sailors learn about the establishment of Soviet power in their homeland, and the ship changes course...
