Nina Ermakova, a country girl, goes to work in one of the largest factories in the country, where she quickly takes a job as a welder. She develops a new welding method, and decides to resume her studies. After graduating, she returns to her hometown to participate as an engineer in the construction of a gigantic industrial complex. During the Second World War, she heads the construction sector of the famous Uralmash factory in Yekaterinburg. Then, after the war, she returns to her factory, where she is entrusted with the restoration of a sheet metal workshop with an extremely short deadline…