The Imperium is on the verge of destruction. It needs a miracle to reunite the feuding High Lords and lead the armies of mankind to victory. It needs a primarch. Tearing itself apart from within, the Imperium is still virtually powerless to resist the ork advance. When the Adeptus Mechanicus reveal they have discovered the orks' point of origin, the Adeptus Astartes start to gather their forces for a massive assault on their enemy's home world. But what the Imperial forces need is a figurehead, a hero from legend to lead them - a primarch. Meanwhile, on the planet Caldera, a mighty armoured warrior fights tirelessly against the orks - is he the saviour the Imperium seeks? A legend returns to the Imperium in its hour of need… if Koorland and his warriors can fight their way through an army of orks to reach him, that is.