For the glory of humanity, the Emperor leads his armies to conquer the Galaxy. One by one, the legions are reunited with the primarchs. In the Taras Divide, in the fight against the monstrous invasion of orcs, part of the XVIII Legion desperately holds the line, not knowing that their primarch has already been found. At the same time, on Nocturne, Vulcan creates a new army, which is waiting to find its true goal. And now the hour has come for them to join the battle. The Lord of the Serpents will not only have to take on the mantle of leader and save his sons, but also forge a new indivisible whole.