On the world of Tevrat, Callidus Assassin Klara Rhasc stalks her prey, awaiting the moment to strike. But when her mark is murdered by a crazed Eversor Assassin, Rhasc embarks on a new kind of mission: to find and subdue her fellow operative.

In the sprawling Imperium of Mankind, everyone serves the Emperor in their own way. From the inquisitors who hunt the hidden enemies of humanity in the dark places of the galaxy to the brave soldiers who stand on the front line, and the Imperial Assassins who can change the tides of war with a single shot, each has a part to play in preserving the Imperium. In this audio anthology, three of these disparate heroes are put to the test, each facing a personal crisis that will see them either fall to darkness, or rise to continue doing their duty in the Emperor's name.   

The Officio Assassinorum safeguards the future of humanity. Its agents are the bloody-handed, secret saviours of the Imperium, killers charged with achieving the impossible...and Vindicare assassin Absolom Raithe has just been handed the most difficult assignment of his career.

A great darkness has befallen the galaxy, and the armies of Chaos are rampant. To survive, humanity must retaliate and take back what they have lost. By the will of the reborn primarch, Roboute Guilliman, is the Indomitus Crusade launched - a military undertaking that eclipses all others in known history. From the Throneworld of Terra does the Avenging Son hurl his fleets, their mission the very salvation of mankind.

On an Imperial outpost world on the fringes of tau space, the renowned Commissar Ciaphas Cain and his fractious regiment of Valhallan Guard, newly created from the remnants of two devastated units, find themselves in the middle of a war. As the Astra Militarum struggle to contain worldwide civil insurrection, can the wily Commissar Cain identify the real villain before the planet is lost to the Imperium forever?

The beleaguered Astra Militarum defenders of Varasine fight against the alien menace of a tyranid invasion, but their only possible salvation approaches in the form of something almost equally inhuman. Warleader Kardan Stronos of the Iron Hands, long having studied the xenos threat, now brings his fearless battle brothers to join the war - only he can save Varasine, measuring his Chapter's infallible logic and ruthless strategy against the cost in human lives.

The Great Crusade is ending. The Emperor has returned to Terra, while Horus remains among the stars to complete the unification of humanity. As the Imperial armies fight the final battles of the age, Remembrancer Solomon Voss seeks the answer to one question—why does Sigismund, First Captain of the Imperial Fists and greatest champion of the Legions, believe that war will not end? Granted a rare audience with the master of the Templars, the answer takes Voss on a revelatory journey to a time before Sigismund became a Space Marine.

Blade of Purity contains two linked tales of the Grey Knights: Incorruptible and True Name.

On the world of Solennes, the battle between the forces of the Imperium and the heretics has become a stalemate of seemingly eternal artillery bombardments. The land is devastated, and the attempts to gain ground by either side end in disaster. Morale is low, and when Trooper Arehn is caught apparently fleeing the front lines, Commissar Selander does not hesitate in condemning him to a very public execution. When Selander starts to see Arehn after his death, he follows the apparition, wracked by doubts - but what will he find? 

The Inquisition moves amongst mankind like an avenging shadow, striking down the enemies of humanity with uncompromising ruthlessness. When he finally corners an old foe, Inquisitor Gregor Eisenhorn is drawn into a sinister conspiracy. As events unfold and he gathers allies - and enemies - Eisenhorn faces a vast interstellar cabal and the dark power of daemons, all racing to recover an arcane text of abominable power: an ancient tome known as the Necroteuch.

For many long years, Gabriel Seth has led the Flesh Tearers to war. Master of a dwindling Chapter, he has made many enemies in his unceasing battle to keep his warriors alive - and now those enemies conspire against him, luring him to a remote world in order to end his leadership and life in the most violent and bloody way possible: Gabriel Seth is to be assassinated. But can even an Eversor Assassin kill one of the deadliest warriors in the entire Imperium?

For a thousand years, the Sabbat Worlds have been lost to the Imperium, claimed by the dread powers of Chaos. Now, a mighty crusade seeks to return the sector to Imperial rule. And at the forefront of that crusade are Colonel-Commissar Ibram Gaunt and the Tanith First and Only - better known as Gaunt’s Ghosts. Trapped in the grinding trench warfare of Fortis Binary, the Ghosts find themselves drawn into a conspiracy to assassinate the crusade’s leader, Warmaster Macaroth.

Exile to the miserable world of Sedh, the disgraced Necron Lord Oltyx is consumed with bitterness. Once heir to the throne of a dynasty, he now commands nothing but a dwindling garrison of warriors, in a never-ending struggle against Ork invaders. Oltyx can think of nothing but the prospect of vengeance against his betrayers, and the reclamation of his birthright. But the Orks are merely the harbingers of a truly unstoppable force. Unless Oltyx acts to save his dynasty, revenge will win him only ashes. 

Plying the stars and forgotten backwaters of the Imperium, Rogue Trader Captain Athene Santiago and her eclectic crew are chasing pirates when their quarry inexplicably vanishes, only to return a moment later. Unwilling to let her bounty go unclaimed, Santiago ventures aboard the now stricken vessel, but what she finds defies reason and leads to a discovery of something ancient and terrifying that could threaten not only her crew and her ship but the entire sector.

Newly promoted to the captaincy of the Ultramarines Fourth Company, Uriel Ventris leads his warriors to the world of Pavonis, where vicious alien raiders are bringing death and destruction. As Pavonis descends into political turmoil, Uriel and his warriors must battle the xenos as they unravel a plot to unleash an ancient evil buried deep beneath the world - the mysterious and deadly Nightbringer.