A downed Warlord, spirit still raging, continues to scorch Zaidos with the heat of a volcano. The end of Zaidos is seemingly drawing near as the planet shudders and destabilizes from the constant war being raged on its surface. The Ultramarines must obtain the power of a Titan in order to secure ultimate victory for the Imperium however they have encountered a warband of Orks who have come seeking vengeance.