After pursuing an insidious genestealer cult across the sector for years, Chapter Master Caedis of the Blood Drinkers stands ready to destroy the original source of the infection - the vast and mysterious space hulk designated Death of Integrity. However, immediately coming into conflict with both their brothers in the Novamarines Chapter and the priesthood of the Adeptus Mechanicus, the Blood Drinkers must reign in their more aggressive instincts and accept the possibility that the hulk itself may be of value to the Imperium...