In France, 1917, an alcoholic captain is afraid that his new replacement, his sweetheart's brother, will betray his downfall.
A British army officer is cashiered, and re-enlists as Private to take part in the Crimean War. He succeeds in capturing a top Russian spy which results in the famous Charge of the Light Brigade to take the Balaclava Heights.
A jealous agent uses a girl singer to break up a double act.
