All resistance has been crushed. In a few minutes of overwhelming violence the Council's air-dreadnought fleet has destroyed Fiz Gorgo's defences. Xervish Flydd, Irisis and their allies have been condemned to die in a brutal aerial spectacle designed to reinforce Chief Scrutator Ghorr's power and majesty.

Tiaan is held prisoner by a vengeful Vithis, who is determined to extract her geomantic secrets at any cost. For his failings, Nish has been cast out and branded a traitor while Irisis, accused of high treason, has been forced to flee for her life.

SANTHENAR IS ON ITS KNEES. The war with the alien lyrinx drags on, and humanity is losing it, but there is worse to come. The Aachim have invaded with an irresistible force - a fleet of battle constructs. Cursing humanity for the loss of Aachan and his own clan, the embittered Aachim leader, Vithis, demands half the world in reparation. The council is in no position to resist. But even if they agree to his demands, can anything satisfy his thirst for vengeance?

Tiaan is in despair. Her life lies in ruins, and now she is being hunted through the abandoned city of Tirthrax by an implacable Nish, who blames her for the attack.

The future of the world rests in the hands of three flawed people: Tiaan, whose geomancy holds the key to the power that can save or destroy them; Nish, who has sworn to bring her to justice; and Irisis, whose great talents are hidden even from herself.

TWO HUNDRED YEARS AFTER THE FORBIDDING WAS BROKEN, Santhenar is locked in war with the lyrinx - intelligent, winged predators from the void who will do anything to gain their own world. Despite the development of battle clankers and mastery of the crystals that power them, humanity is losing. The enemy is destroying their nodes of power, one by one.