The setting is a world where modern civilization has been devastated by a supernatural disaster called “Hollow”

The Hollow disaster suddenly appeared in the world, creating abnormal spaces. Inside, the space-time and terrain are chaotic, and terrifying monsters called “Aetherians” roam. In the midst of this potentially catastrophic disaster, the city of New Eridu, which survived the great disaster, developed countermeasures and obtained resources against the Hollow, overcoming adversity and eventually becoming the last beacon of modern civilization.

Eventually, attracted by the name “Miracle City,” people with various thoughts and beliefs gathered in New Eridu. As the city developed greatly, clashes between internal forces such as conglomerates, gangs, conspirators, and madmen intensified beneath the surface.