Fell times have come again to the Imperium and a War of Faith appears inevitable. Standing in the way of catastrophe is Celestine, the Living Saint and one of the greatest heroes of the age. Only she can reunite the warring factions of the Ecclesiarchy and prevent a second Reign of Blood. Together with the Inquisitor Greyfax, Celestine and her allies must hunt across the shrineworlds of the Imperium and beyond to root out the evil behind the schism and burn it out with righteous, cleansing flame.