35 years ago, suddenly a red moon appeared in the sky, under the moonlight, 70% of the human race have become crazy. This is the mental pollution brought back by the red moon. Survivors hid behind the remaining cities with high walls.

Among the survivors, there were individuals who experienced mental mutations, some of whom struggled to manage these changes. Those unable to control their mental mutations would emit a mental plague and radiation, endangering those around them and posing a significant threat to the remaining human population.

In order to solve the source of the pollution, High Wall City established a special pollution cleanup department, recruiting people who can control spiritual energy, and our protagonist Lu Xin is applying for the most dangerous cleanup department!