In the third year of Jingding's reign, the aftermath of the Ditang Rebellion has not yet been settled, the undercurrents in the court are surging, and the rivers and lakes are full of strange shadows. Xiao Che, the new king of Dongyue, established the "Devil-Subduing Division", which gathered miraculous people from all over the world and was responsible for catching strange cases committed by Qimen's tricks. Its members were dressed in mysterious clothes and wore silver orders for subduing demons. They were called "Xuanyu Guards" by the world. They walk between the palace walls and the market, solve unsolved cases in silence, and kill evil spirits in the dark. The world only thinks of them as ordinary guards, but they don't know that they are the last barrier to protect the country.