Madame Loisel is a middle class woman who dreams of being rich.
When her husband gets her an invite to an affair she does not want to go because she doesn't want to look poor
Madame Loisel made her husband buy her a dress and she kept buying things so she would not look poor.
Madame Loisel gets an expensive dress to the ball. She also borrows a diamond necklace from her friend and goes to the ball. She is greatly admired by everyone at the ball.
When she gets home she realizes she lost her friends necklace and would have to somehow get it back to her
Madame Loisel and her husband used all the money they had to buy another diamond necklace. After 10 years of paying that debt she runs into her friend she borrowed the necklace from who tells her the necklace was not real in the first place