During World War I, Army Lieutenant Roy (Robert Taylor), who was returning home for vacation, met dancer Mara (Vivien Leigh) on Waterloo Bridge. The two fell in love with each other and their love quickly heated up. Just when the two decided to get married, Roy was called back to the camp and the two were forced to separate. Mara was expelled because she missed the troupe's performance and could only depend on her friends. Soon Mara learned that Roy had been killed in the war, and she almost collapsed and was hit hard. Mara, who had lost her love, felt that everything had lost its meaning. In order to survive, she and her friends had to become prostitutes. However, fate played people, and at this time Mara met Roy again. Although she was excited about Roy's survival, Mara fell into pain because of her loss of body. Feeling that everything was irreversible, Mara left in tears and came alone to the place where the two first met-Waterloo Bridge...