The film tells about one day in the life of a battalion of marines of the Red Banner Black Sea Fleet, introduces the battalion commander, delegate of the XXVI Congress of the CPSU Major V. Polosin and three sailors from his unit. View of a military town. The Marine Sailors sleep in the barracks, then quickly climb on command and get dressed. Servicemen in the classroom for drill, theoretical and combat training. Meeting of the sailors-infantrymen with the veteran of the Great Patriotic War, Hero of the Soviet Union Ts. Kunikov. Tea drinking in the soldiers' canteen. Rehearsal of the sailor's ensemble in the club. V. Polosin in the hall of the Kremlin Palace of Congresses among the delegates of the XXVI Congress of the CPSU; Leonid Brezhnev, General Secretary of the CPSU Central Committee, is speaking. Military - delegates to the congress in the hall at a meeting with the Minister of Defense of the USSR DF Ustinov. Servicemen read the text of the military oath (synchronously). Training battle of the marines at sea and on land.