That Which Is Forbidden

How does a man know when he crossed the line? When does he realize that his soul has tasted the sweet nectar of heresy and found it more wonderful and compelling than what he had feared it would be? Louk Shannegh, a hive-born scoundrel in service to Inquisitor Helsing of the Ordo Xenos, is faced with these questions in the aftermath of a battle for the Imperial planet Tenea.