The Horus Heresy ended with half the Space Marine Legions turrning traitor on the Emperors Dream. The 2nd Primarch Julius Kaiser returns as the Forces of Abaddon the Despoiler breach Cadia. As he musters the Armies of the Imperium and as more and more of his Brothers Return. He remembers his life. Before the Imperium. Before the Shattered Dream of Unity.