Mathilde Loisel is unhappy with her lower-middle class life and longs for wealth and prestige. When her husband gets them invited to a party, she borrows a diamond necklace from her wealthy friend Madame Forestier to wear but loses it. They spend 10 years paying off the debt to replace it, ruining their lives financially and draining their youth, only to discover the original necklace was fake and virtually worthless.