Two friends are army officers, and the turbulent times throw them from the Civil War in the early 20s to the Soviet conflict in Finland, from China to the Urals.
Two village boys - brothers Semyon and Pavel - serve a Moscow merchant-shopkeeper. They face harsh exploitation and hard forced labor. The brothers' life paths diverge. Unable to withstand the merchant's bullying, Pavel goes to the factory, becomes a worker, and later a professional revolutionary....
Sergey's girlfriend desperately wants him to quit dangerous police job. But Sergey doesn't want to abandon his new case which proves to be quite difficult.