The worlds of the Vigilus System have echoed to the clamour of cataclysmic war for decades, assailed not only by xenos, but also the armies of Abaddon the Despoiler. A fragile survival was bought at terrible cost – now Vigilus itself must stand or fall without its most heroic saviour. The planet is besieged, its neighbouring systems imperilled with the Great Rift closing in. If it cannot stand, then this beleaguered bastion world and all its defenders will be damned for eternity. You will need a copy of the Warhammer 40,000 Core Book to use the contents of this supplement.