In 2026, the world in the eyes of ordinary people is normal.
But at a level invisible to ordinary people - in ancient times, the monsters, mythical beasts, and alien races recorded in the Classic of Mountains and Seas have never disappeared. Over the past four thousand years, they have learned to hide in human society: some disguise themselves as humans to go to work, some hide in abandoned factories, and some work in convenience stores late at night.
Maintaining the balance between humans and monsters is an ancient organization - the "Demon Suppression Department". Inherited from the time of Dayu's flood control, the original mission was "to quell the monsters in Kyushu after controlling the floods." During the three thousand years, the Demon Suppression Department existed under different names: in the Han Dynasty, it was called "Dian Yao Cao", in the Tang Dynasty, it was merged into "Dali Temple", and in the Ming Dynasty, it was pseudonymized as "Jinyiwei Zhenyao Qianhusuo". Now it is hidden within the system and operates under the name of "Special Service Section of the Urban Management Comprehensive Law Enforcement Bureau", with only seven official members remaining in the country.
