In the 18th century, in France, a noble adventuress Jeanne de La Motte pulled off a bold con—she stole a diamond necklace of extraordinary value and beauty that belonged to Queen Marie Antoinette. According to legend, having staged her own death, de La Motte settled in Russia, where she lived out the rest of her life—but the unique necklace was never found. And now, for more than two hundred years, hundreds of people from all over the world have been hunting for it. Jeanne Okuneva also got drawn into this adventure—she discovered a hiding place in her home, and soon after she was attacked by robbers. But there were no jewels in the hiding place—only an old notebook with pages yellowed by time, covered in faded violet ink. And what if the notebook is the key to the priceless treasure?…