“If as a child the star of the school did not invite you to your birthday party because of your ugly dress, then, as an adult, you should not be friends with this woman. Especially if you buy yourself the tenth diamond necklace!”But, despite childhood grievances, Dasha could not refuse her former classmate Vasilisa Gerasimova when she asked for help. Vasilisa found a necklace of fabulous value in her apartment and asks to find out who planted it. Oddly enough, on the same day, another old friend of Vasilyeva, Anyuta, also came to Degtyarev's agency. It turns out that her husband was poisoned ... Dasha and the colonel begin a double investigation and unexpectedly come to the noble Safonovs, who were killed in the thirties of the last century. They were shot and robbed by the NKVD. It seems that the necklace planted to Vasilisa is just one of those stolen jewels. And the detectives realized that both classmates were lying to them. But why? This is to be found out by establishing all the defendants in that old case and the two current ones.Daria Dontsova is the most popular and sought-after author in our country, the favorite of millions of readers. More than 200 million copies of her books have been sold in Russia.Her work fills hearts and souls with light, optimism, joy, confidence in the future!“Dontsova is an incredible hard worker! I don't know of any other writer who has worked so hard. I treat her with respect as a model of writer's diligence. Women need psychological support and receive it from Dontsova. I myself once read several novels by Dontsova. It is read by very different people. And very busy business women to turn off their heads for a while, and housewives who have a break of 15–20 minutes between taking and picking up their children.” – Galina Yuzefovich, literary critic.