The fate of the war for the future of humanity, raging in the vastness of the Galaxy, balances on the edge of a knife. As the Imperium's greatest heroes battle against the traitor armies, the forces of Chaos rise in the shadows. This anthology features five incomparable stories: aboard the Salamanders' flagship, the Primarch Vulcan will pass his legionary legacy into the hands of the first Father of the Forge; Using stealth and cunning, the warriors of the Alpha Legion will sneak aboard the Imperial vessel and when they begin to seize the ship, their ruthless and methodical tactics will prove devastatingly effective; Arvida, a Space Marine of the Thousand Sons, will be accepted as a brother in the White Scars Legion, but can the orphan Prospero truly find a new home among the savage warriors of Chogoris?; on the planet Astagar, the 90th Ultramarines Company will confront the might of the Chaos Titan; and the flock of believers crossing the wastes of Davin will strive to prove themselves worthy in the eyes of the Dark Gods.