France in the late 18th century. Jeanne de la Motte, Countess of Valois, was an ambitious woman. The Valua family has fallen, lands and possessions stripped. After suffering from poverty and humiliation since childhood, Jeanne is determined to regain everything she has lost at any cost, and takes this as her lifelong goal. Jeanne's ambition finally found a breakthrough when she met the lost nobleman Cardine Rohan. Rohan has been out of favor with Queen Marie Antoinette for many years and desperately needs to regain her favor. However, Roon himself is not very talented, and is full of desire for women and power. Such a person is really a suitable tool for Jeanne.
Louis XVI ordered someone to make a priceless diamond necklace for the queen. After Jeanne learned of the incident, she carefully devised a bold and careful plan to deceive the necklace from Roon. Jeanne used fake letters and IOUs to gain Roon's trust, and even hired a prostitute who looked very much like the queen to pretend to be the queen to date Roon. With Jeanne's negotiation, she successfully defrauded the necklace from the jeweler. And both the queen and Roon fell into a situation of ruin because of those forged credentials. Although Jeanna's carefully planned conspiracy is finally revealed, she is ruthlessly tried. But this incident still exposed the decadence and extravagance of the French court, the queen gradually lost the trust of the people, and the precarious French dynasty became more turbulent. This famous "necklace incident" became one of the triggers of the French Revolution
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