One happy and serene day, the beautiful Lana Krasic received a letter... from the zone from Cobra, in the world of Nadezhda Kim. The seasoned criminal and the businesswoman shared the strongest friendship: Nadya twice saved Lana from death. Now Cobra, serving out her sentence, begged to find her ten-year-old son Sasha. It turned out that the boy remained alive, and did not die, as she was told, and was probably grieving in some shelter. Lana hires a professional detective, and a series of strange and scary discoveries begins. Instead of Sasha, an empty place in the bed is found in the orphanage. And in a ditch they find a brutally murdered detective...