The rise of Abaddon, successor to Horus and Warmaster of the Black Legion. When Horus fell, his Sons fell with him. A broken Legion, beset by rivalries and hunted by their erstwhile allies, the former Luna Wolves have scattered across the tortured realm of the Eye of Terror. And of Abaddon, greatest of the Warmaster’s followers, nothing has been heard for many years. But when Horus’s body is taken from its resting place, a confederation of legionaries seek out the former First Captain, to convince him to embrace his destiny and continue what Horus began.

Abaddon returns from exile and raises the dreaded Black Legion. The Sons of Horus may be no more, but rising from their ashes come the Black Legion. Returning after his long self-imposed exile, Abaddon offers the disparate Chaos Space Marine warbands within the Eye of Terror a simple choice - join him or die. As his newborn war host emerges from the Eye of Terror to ravage the galaxy, none can stand in Abaddon's path, not even the Black Templars Chapter - sworn to stand guard at the storm's edge - nor the Emperor's Champion himself.