Seven damned warriors descend into the bowels of a hive city to destroy a warp-born plague before it consumes eleven billion lives. They were once honoured champions of mankind — until a terrible bargain saved an entire sub-sector and cost them everything. Now hunted by the very civilisation they still serve, they fight without recognition, without redemption, carrying eight centuries of exile in their bones. For Brother Tullus Gannev, former Chaplain of the Covenant Bearers, the only thing left is the oath — and the question of how long a man can keep speaking it before the words go dark.
