An unusual structure is being built by invaders in the center of occupied Moscow. People were brought in from all over the capital to construct it. The city is subdued, resistance is crushed—only separate groups of survivors still try to fight.
It seems the enemy is invincible. But now new forces enter the battle—rebels from another reality come to the aid of Muscovites. To drive out the occupiers, their secrets must be revealed: where they come from, what their true goal is. And what will happen when the terrible jaws of the Main Portal open over Moscow?