As war splits the galaxy, the Emperor toils in the vaults beneath the
Imperial Palace. But his great work is in peril, and the forces of Chaos
are closing in...
While Horus' rebellion burns across the galaxy, a very different kind of
war rages beneath the Imperial Palace. The 'Ten Thousand' Custodian
Guard, along with the Sisters of Silence and the Mechanicum forces of
Fabricator General Kane, fight to control the nexus points of the
ancient eldar webway that lie closest to Terra, infested by daemonic
entities after Magnus the Red's intrusion. But with traitor legionaries
and corrupted Battle Titans now counted among the forces of Chaos, the
noose around the Throneworld is tightening, and none but the Emperor
Himself can hope to prevail.