The fate of the East rests on the edge of a sword as the legions and the Goths march to war…

378 AD: Fritigern’s Gothic horde tightens its iron grip on Thracia and all but a handful of well-walled imperial cities to the south elude him. The few tattered legions pinned in these cities can only watch on from the battlements as smoke rises across their lost lands and the Goths roam at will, pillaging and extorting. Every Roman – legionary or citizen – speaks of only one thing: the Emperors of East and West, Valens and Gratian, who are said to be closing swiftly on this war-stricken land, each bringing with them vast armies capable of vanquishing the horde.

Awaiting the relief armies in Constantinople, Centurion Pavo and the XI Claudia prepare as best they can. The Gothic War has taken much from each of them, and none more so than Pavo. But still he and his fellow officers cling to the chance that two lost to them might yet return: their leaders, Tribunus Gallus and Primus Pilus Dexion – Pavo’s brother – have not been seen or heard from since setting off on a mission to Emperor Gratian’s court in the West. Some are sure they must have fallen, yet Pavo refuses to give up hope, instead whetting his blade and praying that fate will guide the pair back in time for the clash that is to come: a clash that promises to end the Gothic War – for the empire’s finest legions are destined to meet Fritigern’s ferocious masses… on the plains of Adrianople.

The empire is on its knees, but a last hope lies beyond the eastern frontier . . .

377 AD: Emperor Valens has stripped the Persian frontier of its legions, sending every available man to Thracia in an effort to contain the rampaging Gothic hordes. Now, covetous eyes have fallen upon Rome’s trade-rich but sparsely defended desert provinces. Shapur II, Shahanshah of the Sassanid Empire and his many client kings have long believed Rome’s eastern holdings to be theirs by ancestral right, and those lands have never been more vulnerable. Thus, Valens must grasp at the slimmest of hopes that a Persian invasion can be staved off, not by the brute force of absent legions, but by the tenacity of a hardy few. For in the heart of enemy lands, something thought long lost might just offer salvation.

When Optio Numerius Vitellius Pavo and a select group of the XI Claudia are summoned to the Persian front, they leave Thracia behind, knowing little of what awaits them. They know only that they are to march into a burning land of strange gods. They whisper tales of the mighty Persian Savaran cavalry and pray to Mithras they will see their homes and families again. All too soon it becomes clear to them that this is no ordinary mission – indeed, the very fate of the empire might rest upon their efforts. But for Pavo the burden is weightier still, for he knows that the east also holds something even more precious to him . . . the truth about his father.

When the falcon has flown, the mountain lion will charge from the east, and all Byzantium will quake. Only one man can save the empire . . . the Haga!

1046 AD. The Byzantine Empire teeters on full-blown war with the Seljuk Sultanate. In the borderlands of Eastern Anatolia, a land riven with bloodshed and doubt, young Apion's life is shattered in one swift and brutal Seljuk night raid. Only the benevolence of Mansur, a Seljuk farmer, offers him a second chance of happiness.

Yet a hunger for revenge burns in Apion's soul, and he is drawn down a dark path that leads him right into the heart of a conflict that will echo through the ages.