The Soviet embassy in England sends two couriers with diplomatic mail to Leningrad. The inspector of security police, White, and a group of policemen attack the Soviet diplomatic couriers at night. The documents get to an English trackman, who gives them to his son, a sailor in Portsmouth.

The defeated remnants of vile Ukrainian nationalists, headed by the leader of the Ukrainian liberation movement, Symon Petliura, cannot accept their historical fate and are plotting an insurrection against the Soviet regime in Ukraine. There is nothing Petliura and his cohorts would not do to win back control over Ukraine, including selling it to the highest bidder, in this case, the Polish dictator Jozef Pilsudski. A group of plotters are coordinating an insurrection in Kyiv with an attack from Poland headed by Petliura’s general Yurko Tiutiunnyk. Predictably, the invincible Red Army defeats the nationalist plotters and proves that the Soviet borders are impregnable.