After Britain's declaration of World War II, Roy Cronin (Robert Taylor (actor)), an army colonel, is being driven to London's London Waterloo railway station en route to France, and briefly alights on Waterloo Bridge to reminisce about events which occurred during the World War I when he met Myra Lester (Vivien Leigh) whom he had planned to marry. While Roy gazes at a good luck charm, a billiken that she had given him, the story unfolds.