In the 18th century in France, the noble adventurer Jeanne de Lamotte pulled off a daring scam - she stole a diamond necklace of extraordinary value and beauty that belonged to Queen Marie Antoinette. According to legend, having faked her death, de Lamotte settled in Russia, where she lived until the end of her days, but the unique necklace was never found. And for more than two hundred years, hundreds of people from all over the world have been hunting for him. Zhanna Okuneva was also drawn into this adventure, having discovered a hiding place in her house, and was soon attacked by robbers. However, there was no necklace in the hiding place - only an old notebook with pages yellowed from time to time, covered with faded purple ink. What if the notebook is the key to a priceless treasure?