Gregor Eisenhorn is an Imperial Inquisitor tasked with hunting down heretics and preserving the might of the Emperor of Mankind. For six years, Eisenhorn has been hunting facilitator Eyclone, and he's finally caught up to the Chaos agent on Hubris. But Eyclone's schemes are just the tip of the iceberg, and Eisenhorn soon finds himself embroiled in a conspiracy that threatens the rule of man