Thea is a washed-up mimic exterminator who expected more out of life, not some hero from stories. Aven is an impulsive wandering adventurer whose personal goddess is constantly getting her into trouble. Neither of them has the slightest interest in getting involved in world-shaking historical events.

History doesn't care what they want, unfortunately. It's fallen right into their laps in the shape of a god-slaying weapon from a fallen civilization. Thrown together out of chance, Thea and Aven will have to learn to work together if they want to survive their pursuers.

Because if they fail, and the weapon falls into the wrong hands? The results won't be pretty. No one's going to be using it on some random street corner goddess, teakettle god, or any of the other countless teeming millions of divinities on Ishveos.

No, there's one target that sits above all others.

Cambrias, whose watch never ends. Cambrias, whose power has given rise to Cambrias' Wall, the greatest city in the known multiverse—a city that has already covered much of a continent and is strip-mining entire mountain ranges for space and building material. A city that threatens to spread across the entire surface of Ishveos.

And there's no shortage of folks willing to kill Thea and Aven in order to stop the Wall, no matter the consequences.