Mikhail Orlov

A young singer from Buryat-Mongolian collective farm is sent to Moscow to study. Despite his strong voice, he fails a music exam. After the police station he becomes a soloist in a choir and a police sergeant, while studying music reading and dreaming of a conservatory.

A group of young scientists conducts an experiment, putting themselves in the conditions of the people of the Stone Age. With the help of stone tools, they procure food and fire, and make themselves comfortable in nature.

The film is about events which has happened with the "Potyomkin" ship.

Zakhar Psaltyrev went through many ordeals in the royal fleet, where massacres and bullying of people became a custom. Only thanks to his natural intelligence and perseverance, the illiterate peasant boy managed to avoid the fate of many of his comrades, who became drunkards and lost their human dignity. Captain 1st Rank Lezvin, commander of the cruiser "Svyatoslav", himself suffocating in the difficult atmosphere of the tsarist autocracy, fatherly fell in love with his messenger for his simple Russian soul, quick-witted mind, love for the homeland and hatred of oppression. Zakhar learned a lot from Lezvin, but soon they had to part. Zakhar becomes an active underground Bolshevik.

The end of the 1950s. The Chinese passenger plane, following the Beijing-Moscow flight, enters a thunderstorm and makes an emergency landing in the Baikal region. In addition to the Soviet citizen Varvara Komarova, all other passengers are foreigners. Using a stop, they explore new cities and get acquainted with the life, work and rest of Soviet people.

Germany, the 1930s. A young scientist, Professor Johannes Werner discovers rays of life-giving power. The scientist refuses to give up his invention for military use and, breaking the equipment, runs to the USA, where he hides for a long time under the name of Martini. One day, after being invited to a military industrial concern to see a new European invention, Werner meets his former pupil Huber. Huber, a traitor and fascist, has restored the professor's apparatus according to stolen plans and is demonstrating it as his own invention. Werner rejects the proposal for joint cooperation and, at a meeting in the hall of scientific associations, reveals his real name and resolutely reveals the criminal intentions of the revanchists.