Vilho Mathias O'Gruagain

As war rages in the Pandorax system, the Imperial battleship Revenge comes under attack by the dread forces of Chaos. As warriors of the Black Legion rampage through the venerable craft, Supreme Grand Master Azrael leads the First Company of the Dark Angels - the elite Deathwing - onto the vessel to eliminate the enemy. Separated from his men, Azrael finds himself trapped in the lower decks with only a tech-priest for company and one of the galaxy's most fearsome warriors hunting him: the infamous Khârn the Betrayer.

Two centuries ago, the Imperium of Man and the upstart Tau Empire fought to a standstill in the Damocles Gulf. Now, as the 41st millennium draws to a close, the tau have returned. As the world of Agrellan falls under attack, the White Scars and Raven Guard rush to its defence, but with the skilled Commander Shadowsun leading the alien forces, the Space Marines and their allies are hard pressed. Kor'sarro Khan, Huntmaster of the White Scars, swears that he will win the day in the most direct way possible – by taking Shadowsun's head.