In the chaotic times of the late Tang Dynasty, demons were rampant.
Respected and worshiped by all Yin-Yang magicians, they are like four shining stars in Yin-Yang Dao - the four major Yin-Yang Dao families of Luo, Yin, Zhongli and Helian. People from the four major families have studied the magic of yin and yang for generations, and they are all excellent yin and yang magicians. Among the youngest generation who shoulder the future of the four major families, the most promising ones are Luo Qingcheng, Yin Yuehe, Zhongli Zhao and He Lianlu. The four of them adhere to the Yin and Yang Tao to kill demons and protect the morality of the world. With their extraordinary talents and painstaking study of the Yin and Yang Tao, they resolve one battle after another.