The Fifth Legion has fought on the fringes of the Imperium for too long, unaware of the Warmaster's rebellion and the conflict that inevitably followed. Only after their primarch Jaghatai Khan was firmly convinced that he had taken the righteous and true path did the White Scars choose a side and attack the traitors on all fronts. But now, four years later, the indomitable spirit of the fighters is broken by a ruthless war of attrition against the Death Guard and the Emperor's Children. In order for the legion to fight in the final apocalyptic battle, the storm prophets of Khan must find a direct path to Terra.