Everyone knows that Xu Xian is weak, but they don't know that the "Security Hall" he inherited is actually a "human asylum" to protect aliens. While others were hunting monsters in the city, Xu Xian was busy arranging cleaning work for the out-of-control "Snow Girl" and using ancestral contracts to appease the rampaging alien species. He is a heretic in the eyes of the Tianshi Mansion, but he is the only salvation for the monsters. Until that rainy night, an oil-paper umbrella covered the destitute "creditor", and an urban legend about shelter, healing and taboo cooperation began.
Mission: Find justice beyond definitions, and protect humanity above rules.