A blighted Japan, year 4026
The Blight has overrun the world. Forests push through the wasteland and malefacts roam the land. Emma and Koo meet in the far east and travel toward the far west, where they must confront the Beast of Reincarnation, said to be the source of all Blight. The journey from far east to far west drives the story, and the landscape shifts from overrun wilderness toward where the corruption begins.
Sealing is how the world fights the Blight. Sealers hunt malefacts and draw Blight out of the land and into themselves, which makes Emma both the world’s best hope and a person it fears. The official material keeps returning to that tension: a weapon the world needs but shuns. It explains why a girl with no memory would walk toward the source of the corruption.