Night is falling. The greatest darkness in Terra's history is coming. Rogal Dorn and his fellows look to the skies, as they await the coming of Horus. And he is near…

Midnight is coming. For long years, the defenders of Terra have stood sentinel, awaiting the inevitable: the coming of the Warmaster, the traitor Horus and his horde. For Rogal Dorn, his brother primarchs and his loyal sons – among the billions of others awaiting the breaking of the storm – the wait is almost over. The sun is setting and night falling. And the enemy comes.