The trenches run red with more than blood.

For three hundred years, the Ottoman Empire has held the line against the Pit itself. Their diesel-powered Djinn Walkers stride through sulfurous battlefields, their crews breathing blessed vapors as they rain sanctified ordnance upon the endless hordes of the Damned. But the ancient seals that keep Hell's armies at bay are cracking, and with each breach, reality itself begins to fray.

Captain Mehmet Bey commands the Iron Prophet, a towering war machine fueled by bound djinn and bristling with thaumic weaponry. When his unit discovers that the legendary Ring of Süleyman—Solomon's seal of dominion over all supernatural forces—lies buried somewhere in the corpse-strewn wastes between the trenches, he volunteers for what may be the Empire's final gambit.

But they are not the only ones seeking the Ring. Across no-man's-land, the Crusader States deploy their own mechanical monstrosities, piloted by fanatics who believe God's will flows through diesel fuel and sanctified steel. And in the deepest trenches, something ancient stirs—older than Islam, older than Christianity, older than Solomon himself.

As the barriers between worlds collapse and abominations that predate human language claw their way into reality, Mehmet must choose: secure the Ring for the Empire, or destroy it before its power consumes what remains of the world.

In the shadow of titans, faith is the only armor. In the face of the abyss, damnation may be salvation.