Anna Karenina [Vivien Leigh] is married to Alexei Karenin [Ralph Richardson], a cold government official in St. Petersburg who seems more focused on his career and social standing than on meeting his wife’s emotional needs. Called to Moscow by her brother Stepan Oblonsky [Hugh Dempster], a reprobate who has been unfaithful to his wife Dolly Oblonsky [Madge Brindley], Anna steps into a world where duty and reputation loom large over personal happiness.
On the night train to Moscow, Countess Vronsky [Helen Haye] shows Anna a picture of her son, Count Vronsky [Kieron Moore], a cavalry officer about to enter the social sphere. Vronsky himself boards the train and is instantly drawn to Anna, boldly signaling his interest, while she tentatively resists without fully closing the door to him.
At a grand ball, Vronsky’s pursuit of the married Anna becomes the talk of the room, thrilling some spectators and scandalizing others. Kitty Scherbatsky [Sally Ann Howes], Dolly’s sister who is smitten with Vronsky, is humiliated by his behavior and leaves the ball, much to the distress of Konstantin Levin [Niall MacGinnis], a suitor who had hoped to win Kitty’s heart. Yet a change of heart soon reshapes the situation, and Kitty eventually marries Levin.
Boldly following Anna back to St. Petersburg, Vronsky makes their relationship public, and society’s whispers grow louder. Karenin learns of the affair and issues a stark ultimatum: Anna must sever ties with Vronsky or risk losing her son. She tries to comply, but the pull of the romance proves overwhelming and defies easy resolution.
Anna becomes pregnant, but the child is stillborn. Karenin, displaying a measured magnanimity, grants Vronsky the option to visit Anna if she calls for him. The scandal gnaws at both lovers, and Vronsky’s nerves flare enough to drive him to the brink, leading to a failed suicide attempt.
Unable to forget Vronsky, Anna cannot return to a peaceful life with Karenin. She leaves him for good and travels to Italy to be with Vronsky, yet doubts about his devotion plague her. As the relationship strains under the weight of circumstance and guilt, she feels she has sacrificed everything and ultimately chooses a solitary, devastating end: she walks onto the railway tracks and is struck by a train, ending a life shadowed by passion and loss.