The "Fiery Arc" tells of a grandiose battle on the Kursk Bulge in the summer of 1943. Here was the largest tank battle in the history of World War II. Along with the personal fate of the heroes, the film shows battle scenes, the activities of headquarters and intelligence, those who worked at the front and in the rear.

Based on short stories by Vasiliy Shukshin. About the life and people of the modern Soviet village. Old Yermolai lived all his life in one village. He has four sons, each with their own problems. The youngest foolishly ended up in jail and, three months before his release, greatly missing his family, escaped.

The film covers the period from 1900 to 1917. Historical events—the Russo-Japanese War, January 9, and others—are shown through the eyes of a mother who begins to realize that her children have many like-minded followers, and thanks to this, she comes to believe in the feasibility of the ideals for which her eldest son sacrificed himself. Only the awareness that his cause is not hopeless, that it is achievable and close to victory, gives her the courage to endure separation from her loved ones and wandering.

Fascist Italy's prime-minister Mussolini is arrested following the Allies landing in Sicily. Meanwhile, Soviet troops plan their offense towards Kyiv. Lt. Col. Lukin's regiment crosses the Dnieper river as the division's vanguard. Unbeknownst to them, they're merely a ploy to mislead the Germans so the rest of the army can catch them off guard.