Having tracked a genestealer brood across the sector, Chapter Master Caedis of the Blood Drinkers calls upon his old allies in the Novamarines to assist in the destruction of the space hulk designated Death of Integrity. But before they can unleash their plasma torpedoes, the Adeptus Mechanicus intervene and task both Chapters with a secretive mission into the heart of the hulk. With deadly xenos creatures seemingly lurking around every corner, Caedis treads a fine line between glorious victory and the damnation of eternal bloodlust carried by all sons of Sanguinius.