In the brutal desert city of Kasaban, the old gods have had their statues crushed to powder by invading Priests, with magick forbidden to anyone but themselves. Merely being born as one of the magi makes even infants into fugitives, and the Priests and their spies are always watching, ready to toss their enemies into the purifying flames of execution.

Saya Ani Anai is the last of her family, dedicating her life to being a teacher of magick for little orphaned children. From within her hidden home, she provides the closest thing to a normal life these children may ever know. They help each other like family, working for what they can and stealing the rest to scrape by, forced to live every day under the yoke of oppression.

When the warren-boss who keeps their domain a secret suddenly demands a higher price to keep his silence, they must race to find a way to meet the demand or they will lose their home and their lives. But for the poor living in Kasaban, simply surviving is anything but easy.

With the Priests and their magick-hunters scouring the city for magi to burn, and the catastrophes of daily life intervening to crush her plans at every turn, Saya must risk everything to save her home and keep the children safe. But Kasaban is unforgiving. Its fires rage bright. If she fails, all her hopes will burn.