Cut off from the might of the Imperium by the Great Rift, and beset on all sides by the daemonic forces that emerge from the tear in reality, the Gilead System stands as a bastion of faith in the Emperor. Unable to call for reinforcements or escape the System, the citizens of these planets fight to preserve the Imperial Creed as they battle back the vile xenos, corrupted renegades, and foul daemons that assail them. But even as the Imperium`s diverse factions unite in this time of desperation, the rifts between them grow. With the Emperor`s watchful gaze obscured by the Great Rift, powerful opportunists pursue their own goals, and reignite old rivalries.