In a deep, dark cell beneath an Inquisitorial fortress sits a most singular prisoner. Tasked with the interrogation of this heretic, Wodin Grime, acolyte of the great Inquisitor Neit, sets about his task with zeal and vigour. But as he speaks with the traitor, doubts begin to settle in Grime’s mind, about himself, the prisoner and, worst of all, the loyalty of his master. But can the interrogator really trust the Space Marine who calls himself Alpharius?