The great detective of the Russian land, Zhenka Zaitseva, confidently followed the trail of a criminal group engaged in the “left” mining and sale of Yakut diamonds. Many people assisted the investigation, including the well-known crime boss Kuzya and his militants. Even abroad lent a helping hand: a guest of Zhenya’s family, a real American cop Russell Dougherty, got involved in the case. And everything would be fine, and the criminals were about to be caught, but evil fate in the person of a relative - senior investigator of the prosecutor's office Vovka Ulyanov - as always, ruined everything...