The Ultramarines battle the traitorous Death Guard on the plague-ridden world of Orath. Contains three linked novellas telling the full story of the war for Orath: Plague Harvest As the world of Orath withers under the grip of a deadly plague, Ultramarines Librarian Vabion and his Doom Eagles allies fight to uncover the source of the contagion. Engines of War The Ultramarines, under Captain Galenus, bring their engines of war to the plague-stricken world of Orath as they fight to save the planet from the clutches of Chaos. Armour of Faith Assailed by daemons and with the fate of an entire sector in the balance, Ultramarines Chaplain Sentina faces the ultimate sacrifice if he is to win the war on Orath.