The film recreates the heroic epic of the defense of Sevastopol, in 1941-1942. Autumn 1941 after breaking through the Soviet defenses at Perekop, Nazi troops penetrate the Crimean peninsula beginning the siege of the city of Sevastopol. The Soviet fleet is forced to move to Novorossiysk. For the defense of Sevastopol, only the ships' guns, coastal batteries and various marine infantry units will remain. The defense will be led by General Petrov.