In the 41st Millenium, the enemies of mankind are legion, omnipresent and utterly deadly. While the warriors of the Imperium fight with firepower and faith, the Holy Inquisition hunts the shadows for the most terrible of foes – rogue psykers, xenos, and daemons. Inquisitor Eisenhorn must track down and defeat the forces who would destroy him or face the wrath of the Ordo Malleus.