Yasha Toporkov is in love with a cheerful girl Marishka. He is young, happy and satisfied with life — Marishka recently became his fiancee. Yasha is also happy with his work. Everyone knows Toporkov at the construction site: his team came out on top. And Yasha had long forgotten about the "left outfit" for which the foreman had given him extra money. Nevertheless, it is precisely because of this that an accident occurs at the construction site, a welder is killed, and the site foreman Mirzoyan is removed from leadership.

Two foolish and frivolous guys cause suffering for the whole youth union at the factory. It was already decided to dismiss Anatoly Grachkin and his friend Victor Gromoboev but they are taken under the wing by Nadia Berestova, a diminutive funny woman, known as the popular one at the plant. At first, Nadia took it with reluctance and apprehension, but gradually this commission became the most important thing in her life.

An endemic fever arose in the large Siberian construction area. Four scientists involved in the development of a vaccine against this disease, and whose laboratory was threatened with closure, are sent to the center of the outbreak. They manage to find the cause of the infection and create a vaccine.

Based on Finnish mythology; Lemminkäinen woos the fair Annikki and battles the evil witch Louhi. Louhi kidnaps Annikki to compel her brother to build for her a Sampo, a magical device that creates salt, grain, and gold. When Lemminkäinen fails to recover the Sampo, Louhi steals the sun, plunging the world into frozen darkness.

A Soviet dam project means that many old Ukrainian villages will end up under water. There are conflicts between the dam engineers and villagers who don't want to move.

A young ordinary communist, Vasiliy Gubanov, was among many who took part in the construction of the most important facility for the young republic, the power plant. He did his job in a way that was beyond human ability. He could love, too, with a passion and a passion for self, but his life was cut short very early.

Agronomist Valya Chernysheva fell in love with the new chief agronomist of the MTS Savitsky, a widower with two small daughters. During the illness of one of the daughters, whom Valya was nursing, he realized that she had become a close person for him. But the girl left to work in another distant collective farm.

The story of a young woman who, after her years at university in the city, returns to her hometown an engineer and begins work on a huge new power plant. She continues to supervise work on the plant throughout the war.

About the life and heroic death of the old Bolshevik-Lugansk resident, participant in the civil war, Aleksandr Yakovlevich Parkhomenko. In 1918, capturing Ukraine, the German occupiers sought to use the Haidamaks, the White Guards and the Greens in their struggle. By order of Voroshilov, Aleksandr Parkhomenko from Lugansk arrives in Tsaritsyn. At the same time, the Germans launched an active offensive. The "red" battalions are poorly armed, however, Parkhomenko manages to raise them to the attack and put the enemy to flight.