A United Nations team makes an extremely disturbing discovery in a Congolese village. An unknown force put men, women and children into an unconscious, rigid state. The environment - both plants and animals - is increasingly cunning and predatory, and it evolves and transforms incredibly quickly. A mysterious phenomenon spreads from a cursed place in the forest - known as the Kingdom of Bones - and threatens the whole world.
Commander Gray Pierce and Sigma Force are prepared for the most extraordinary circumstances and have saved the world many times, even if they have paid a high personal price. However, even these experienced and seasoned scientists and warriors have no idea what or who is behind such a terrifying development - or how to stop it. They frantically try to find answers, but quickly realize that they themselves have become prey.
Nature is turning against humanity and is about to turn the world into a Kingdom of Bones.