This is a novel about the secret arts of yin and yang and strange people in the world. Many secret arts and Taoist methods have been lost today, but some people still preserve the things left by their ancestors. They know the yin and yang, know the Taoist methods, and possess unique skills. They may hide in the city or practice Taoism in the mountains and countryside. This is an era where the boundaries between gods and ghosts are no longer clear-cut, and it is also an era where colorful beliefs are missing. Two unlucky guys stumbled into the world of Yin and Yang, uncovering the shadows and mists hidden in the sun.