Soviet and Vietnamese students are singing. Vietnam. Celebrating the 30th anniversary of the Democratic Republic. Rice harvesting. Construction in Hanoi. The streets of the town. Port. A dump truck, an excavator is working. THE USSR. Workshops of a tractor plant, a metallurgical plant. Soviet and Vietnamese miners and metallurgists are working. Classes of Vietnamese students at vocational schools. Bezmeinskaya GRES. Soviet and Vietnamese power engineers. Factory "Red Proletarian". A brigade named after the Vietnamese heroine Chan Thi Wan. Workshop of the plant. Harvesting machines in a field with the Vietnamese name Vu-Thang at the Poludinsky state farm. Schoolchildren in the classroom. Pioneers at a meeting with the Vietnamese. Footage of the chronicle of the Vietnamese war. A scene from the play "Man to Man".