Heart of Africa, Congo. An international medical team has made a shocking discovery. Something unknown infects people here, plunging them into a state of deep stupor, making them immune to the outside world. At the same time, plants and animals hyperevolve, becoming more and more hostile to humans before our very eyes. The catastrophe that threatens the continent and eventually the whole world comes from the deep jungle - a place that the natives consider cursed and call the Kingdom of Bones.

Why is the biosphere going crazy? Due to internal reasons? Or, even worse, due to artificial influence? The members of the Sigma special squad must find out, having managed not to become victims of a biological threat. Soon they will discover the deafening truth about the essence of the human species and the fate that awaits it. But now the main thing is to prevent the transformation of the entire planet into an endless kingdom of bones ...