The village where Xin Ning was born is surrounded by smoke all day long. It is a place where mortals are not allowed to set foot. However, the people in this village are no different from ordinary people in the world. They also have to eat, drink and have sex. They also have spring, summer, autumn and winter. They are collectively called earth immortals, which are the lowest level among the immortals. Secondly, there are the immortals. Each of the immortals has a pair of wings and can fly to any corner of the world. Their main task is to follow the arrangements of the only immortal with the highest level among the immortals, the Emperor of Heaven, to go to the human world to help those mortals in need, and to slay demons.