Madame Loisel is a middle class woman who wants riches and to live high class, but she can't because she married a middle class man.
Madame and her husband then get invited to a upper class party.
Madame Loisel does not have a dress or jewelry to wear to the party so she doesn't want to go.
Conflict (Man vs Man)
Madame Louisel buys a dress and then borrows a necklace from her upper class friend. She then goes to the party and has a really good time. All the men wanted to dance with her. She left the party with her husband, and they rode home in a carriage.
She arrives home and realizes her necklace is missing.
Madame Loisel had to work hard the rest of her life so that she could pay back the money she owed for the necklace. She is now very poor. She then comes across her friend and tells her about how she lost the necklace 10 years ago. Her friend tells her that the necklace was fake.