The Khorsari Reach has languished under the foul dominion of the Death Guard for more than a decade, its worlds choked by plague and despair. Now, Ferren Areios, Captain of the Ultramarines Sixth Company, has sworn a solemn oath to reclaim these lost territories and avenge the countless innocents butchered by the servants of Nurgle.
Yet as he leads his warriors into the corrupted heart of the Reach, Areios finds himself tested as never before. To purge these tainted worlds, he may be forced to walk perilously close to the limits of his Chapter's creed — and confront the question of how far an Ultramarine can go in the name of vengeance.