The action takes place in 1920 during the Civil War. Crimea on the eve of complete liberation from the White Guards. Returning from patrol, the four brave “elusive” knocked down an airplane. In the field bag of the captured pilot, they find a secret report, which speaks of the existence of defensive fortifications around the coastal city, which the Reds have yet to take. Young heroes get the task to get a map of fortifications and go to the city...