The Inquisitor, Bronislaw Chewak, is being hunted. Fleeing from the Black Library of the Eldars, Chewak kidnaps the Atlas of Hell - a living map of the web of paths. With this legendary artifact and his incredible intelligence, Chevac knocks off the trail of the predatory Harlequins sent to capture him, and destroys the plans of enemies from the Inquisition who wanted him dead. But Chewak's main enemy is Ariman, the Archimagogue of a Thousand Sons. He wants to take possession of the knowledge of the Black Library, knowledge that can elevate him to the level of a deity, and therefore wants to destroy the inquisitor standing in the way. In a desperate pursuit that bends the fabric of reality, Chevac's only hope of salvation is to outwit Chosen Tzinch, the Lord of Chaos, and the Architect of Destiny. The price of failure for the Empire is simply unimaginable, which means that there is no way back.