The Black Dragons fall upon the world of Antagonis, summoned to combat the plague of undeath that has engulfed the planet. Allying themselves with Inquisitor Werner Lettinger and a force of Sisters of Battle, the Black Dragons endeavour to save the souls of the Imperial citizens who have succumbed to the contagion. But there is more than a mere infection at play - the dread forces of Chaos lie behind the outbreak, and the Black Dragons stand in the way of the Dark Gods' victory...