Humanity is faced with the most terrible enemy in its entire history. The sky itself has declared war on us. Battles are being fought on the ground, in the clouds, in the oceans... And it seems that we are already losing this battle. Soon we will have to return to the caves, having lost all the achievements of civilization. The only thing that can help are people who are able to look on the other side of the front, to become part of the cruel guard of the sky, in order, at the cost of their own losses and suffering, to give humanity one last chance.