The film tells the story of young people traveling to Vienna for the International Festival of Youth and Students. One of them, V. Znamensky, is a senior engineer of the automation laboratory of the Kuibyshevskaya HPP. Hydroelectric power station construction: welding works, excavator work, turbine hall installation. Armenia. Byurakan Astrophysical Observatory. Scientist - astronomer Hrant Tavmosyan works here. President of the Academy of Sciences of the Armenian SSR VA Hambartsumyan talks with G. Tavmosyan. G. Tavmosyan monitors instrument readings in the observatory laboratory. The virgin state farm "Yaroslavsky". M. Dovzhik's tractor brigade is working in the field, having lunch. M. Dovzhik at home. The city of Leningrad. Alla Osipenko, the prima ballerina of the Leningrad Opera and Ballet Theater, walks the streets of the city, in the classroom in the ballet class, dances in the performance. Minsk city. Construction. The work of the plasterer A. Digilevich, his speech from the rostrum at the session of the Supreme Soviet of the Byelorussian SSR. Moscow city. Lenin Stadium. Youth sports festival. Athletes walk across the field, perform gymnastic exercises. Competition swimmers, among them L. Antonova. L. Antonova takes a ticket, answers the final exams at school. Graduates in Red Square.