About how Soviet border guards managed to detect and neutralize foreign intelligence agents.
Based on real events that took place during the construction of the Nurek hydroelectric power station, where a new form of socialist competition, “Workers' Relay Race,” was born.
A young Ukrainian woman, Daria, marries a Tajik soldier, Rasulov, and leaves for his village. Their daughter is born, and soon the Great Patriotic War begins. The husband is wounded at the front and loses his eyesight. Daria's long struggle to bring Rasulov back to life is bearing fruit - he is beginning to see...
