Commissar Cain is called to duty once more, saving a governor's daughter from a planet over-run by rebels. The uprising hides something far more sinister however – genestealer hybrids! The search for the source of the alien threat leads Cain to a drifting space hulk – a far safer place than beside the obsessed governor's daughter.
But when the Reclamator Space Marines suffer devastating losses at the hands of the Great Devourer, Cain and his trusty aide Jurgen must go it alone. With the tyranids waking and a group of stowaway orks on the loose, there are no safe places to run or hide, and Cain must use all his ingenuity and cunning to escape the space hulk alive.