Lily Bart loves Lawrence Selden, a lawyer of moderate means, but she is also pursued by Simon Rosedale, a wealthy businessman, and Augustus Trenor-Dorset, a married man. When Dorset's wife Bertha announces that she is going to the country (although she really plans to meet Ned Silverton, with whom she is having an affair), Dorset asks Lily to dine at his home. Alone with him at the house, she rejects his advances, but when Mrs. Dorset returns, she publicly insults Lily, forcing her to move to another town. Lily's aunt dies and leaves her penniless, whereupon she reluctantly begins to seek employment. She is about to kill herself when Selden, who has never stopped loving her, enters the room and convinces her to marry him.
—AFI