The Great Crusade continues. The Imperium of Man is bringing back under its wing worlds that lost contact with Terra in the distant past. Nurt is one of these worlds. And bringing it to Agreement should not have caused any difficulties. But the company drags on, and the Alpha Legion, the most mysterious and secretive of the Astartes Legions, comes to the aid of the Imperial Army. No one can know what motivates these mighty warriors, what lies behind their often paradoxical actions. Even Eldar seers are unable to unambiguously predict the future that Alpharius holds in his hands. Lies and secrets are his weapons. He will betray the Imperium. And will remain faithful to the Emperor.