A bloody act of violence inspires Arcturus Mengsk of the Koprulu sector to follow in his father's footsteps--Angus Mengsk--and lead a rebellion against the corrupt Terran Confederacy.
In the futuristic Warhammer 40,000 universe, the Warmaster Horus takes over the reins of power and must deal with his rivals and the temptations of Chaos, which threaten to draw him down a dangerous and fateful path.
Treachery spreads through the Imperium as Horus mobilizes the forces that are loyal to him and battles to win the Imperial forces to his cause, while plotting how he may destroy those who will not follow him.
