After the failure of the Horus Heresy, the Chaos Legions retreated into the Eye of Terror. Among them, the Iron Warriors Legion's quickly raised troops, Peter and his brothers, broke away from the Legion and formed their own warband, the "Forged in Steel" Brothers.

"We are no longer 'hasty recruits,' no longer expendable, no longer Iron Warriors, no longer slaves to Perturabo. We are now the 'Forged in Steel' Brothers."

"And this is my battle axe, 'The Blood of Crassus.' The Blood of Crassus will have its vengeance.

This is not a story about a savior, but a dark epic about how "survivors," caught between emperors and chaos, find a glimmer of hope for humanity in their own way, and ultimately become a "third party" feared by both sides.