The city states of the Lowlands have lived in peace and prosperity for decades: bastions of civilisation and sophistication. That peace is about to end. In far-off corners, an ancient Empire has been conquering city after city with its highly trained armies and sophisticated warmaking.... And now it's set its sights on a new prize. Only the ageing Stenwold Maker, spymaster, artificer and statesman, can see the threat. It falls upon his shoulders to open the eyes of his people - as soon a tide will sweep down over the Lowlands and burn away everything in its path.

The Wasp Empire’s armies are on the move. The city of Tark will be first to feel their might, now preparing for siege. And within its walls, Salma and Totho will take a stand alongside their Ant-kinden brethren. But they’ll face weaponry and numbers such as the Lowlands have never seen. Meanwhile, the empire's secret service has deemed Stenwold Maker too dangerous to live. So Major Thalric is dispatched to eliminate Stenwold and destroy his beloved city of Collegium. For if this centre of learning is lost, it will crush all hope of intelligent resistance.

Achaeos the seer has tracked the stolen Shadow Box to the marsh-town of Jerez, driven by the ghosts of the legendary Darakyon. But he has only days before this magical artifact will be lost to him forever.... Meanwhile, the Empire's dread forces are mustering for their next great offensive. Stenwold and followers have only a short time to gather allies, before the enemy's soldiers march again - conquering everything in their path. If Stenwold cannot hold them back, the hated black and gold flag will fly over every city in the Lowlands before the year's end. 

Uctebri’s long search for the Shadow Box is finally over. Now the vampiric sorcerer can begin his dark ritual. The Wasp-kinden’s emperor believes this will grant him immortality, but Uctebri has his own plans - for the emperor and the empire. The mighty Wasp armies are on the march. And now war is imminent, spymaster Stenwold can finally separate allies from false friends. For the empire won’t stop until a black and gold flag hangs over Collegium, Stenwold's home city. 

Ancient powers are waking. The war with the Wasp Empire has ended in a bitter stalemate, and Collegium has nothing to show for it but wounded veterans. Cheerwell Maker finds herself broken in ways no doctor can mend, haunted by ghosts of the past. Meanwhile, the powerful Wasp Empress is regaining control over those imperial cities that refused to bow to her.

A shadow is falling over Collegium. Despite the tenuous peace, Stenwold Maker knows that the Empire will return for his city. Even as he tries to prepare for the resurgence of the black and gold army, a hidden threat is working against his people. Ships that sail from Collegium's harbour are being attacked, sunk by pirates. Some just go missing.... 

Tynisa is on the run, but she cannot escape the demons of her own mind. Amidst the fragmenting provinces of the Dragonfly Commonweal, her past will at last catch up with her. Her father's ghost is hunting her down. At the same time, the Wasp Empire seeks to conquer the city of Khanaphes, the fallen jewel of the ancient world. Whilst Empress Seda's soldiers seek only conquest and prestige, she sees herself as the heir to all the old powers of history, and has her eyes on a far greater prize.

All is in turmoil as the world moves towards war. In Solarno, the spies watch each other and ready their knives, while Myna sees the troops muster at its border and emotions run high as it vows never to be enslaved again. In Collegium, the students argue politics, too late to turn the tide. In the heart of the Empire, new pilots have completed their secretive training, generals are being recalled to service and armies are ready to march.

Relentlessly advancing towards Collegium, the Empire is again seeking to break down the city's walls. The mighty imperial armies have learnt from their failures and Empress Seda will brook no weakness in her soldiers. After all, Stenwold Maker has earned his title and the War Master has strategies to save his city. His aviators rule the skies - but the Wasp Kinden Empire has developed a terrifying new aerial weapon.

The Empire stands victorious over its enemies at last. With her chief rival cast into the abyss, Empress Seda now faces the truth of what she has cost the world in order to win the war. The Seal has been shattered and the Worm stirs towards the light for the first time in a thousand years. Already it is striking at the surface, voraciously consuming everything its questing tendrils touch. Faced with destruction, Seda knows that only the most extreme of solutions can lock the Worm back in the dark once again.