Today in the 35th century, the mutants that lived in the human world thousands of years ago were defeated by humans and were imprisoned in the Earth Core to become the Earth Realm. In recent years, as the seal of the Earth Cage loosened, many Earth Realm people escaped to the human world and used their supernatural powers to commit crimes. Longcheng established a special investigation department, cooperating with the Black Robe Envoy, the administrator of the Earth Realm, to specifically combat supernatural crimes. The young and carefree director Zhao Yunlan took office and opened up a new situation.