From the very first days of the Great Crusade, Sanguinius—the angelic Primarch of the Ninth Legion—was among Horus’s closest and most faithful brothers. But all this time, his Blood Angels were forced to conceal a painful secret concerning their true nature. Horus learns about the flaw in the Legion, and the Warmaster hints to his brother that the key to saving the Angels can be found in the ruins of one of the conquered worlds. The sons of Sanguinius rush there without hesitation.
And when Horus’s treachery becomes obvious, the Blood Angels will have to face not only the armies of Chaos, but also their own demons—released onto the plains of the Signus Prime…