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 crippled in ways no doctor can mend, haunted by ghosts of the past that she cannot appease, seeking for meaning in a city that no longer seems like home. The Empress Seda is regaining control over those imperial cities who refused to bow the knee to her, but she draws her power from something more sinister than mere armies and war machines. Only her consort, the former spymaster Thalric, knows the truth, and now the assassins are coming and he finds his life and his loyalties under threat yet again. Out past the desert of the Nem the ancient city of Khanaphes awaits them both, with a terrible secret entombed beneath its stones...

The vampiric sorcerer Uctebri has at last got his hands on the Shadow Box and can finally begin his dark ritual--a ritual that the Wasp-kinden Emperor believes will grant him immortality--but Uctebri has his own plans for both the Emperor and the Empire.

The massed Wasp armies are on the march, and the spymaster Stenwold must see which of his allies will stand now that the war has finally arrived. This time the Empire will not stop until a black and gold flag waves over Stenwold's own home city of Collegium.

Tisamon the Weaponsmaster is faced with a terrible choice: a path that could lead him to abandon his friends and his daughter, to face degradation and loss, that might possibly bring him before the Wasp Emperor with a blade in his hand--but is he being driven by Mantis-kinden honor, or manipulated by something more sinister?

Driven by the ghosts of the Darakyon, Achaeos has tracked the stolen Shadow Box to the marsh-town of Jerez, but he has only days before the magical box is lost to him forever. Meanwhile, the forces of the Empire are mustering over winter for their great offensive, gathering their soldiers and perfecting their new weapons. Stenwold and his followers have only a short time to gather what allies they can before the Wasp armies march again, conquering everything in their path. If they cannot throw back the Wasps this spring then the imperial black-and-gold flag will fly over every city in the Lowlands before the year's end. In Jerez begins a fierce struggle over the Shadow Box, as lake creatures, secret police and renegade magicians compete to take possession. If it falls into the hands of the Wasp Emperor, however, then no amount of fighting will suffice to save the world from his relentless ambition.