Spring 1855: At the height of the Crimean War, the siege of the Russian city of Sebastopol continues. In a desperate attempt to cut the Russians' supply line at the Sea of Azoff, the Allies commit 15,000 troops, 5 batteries of artillery, and virtually every ship of their Black Sea fleets. Commander Phillip Hazard and HMS Huntress undertake the crucial mission of marking a new channel for the Allies' attack under the formidable shore batteries guarding the Strait of Yenikale. Forced to make some hard decisions, Hazard faces court martial afterwards.