After Su Yun, the descendant of the Yin Yang family, was mistakenly arrested by the Public Security Bureau, he met police beauty Ren Yingying. With the help of Su Yun's yin and yang skills, the North Bureau of the Public Security Bureau successively solved the murder case of the son-in-law, the poisoning case of the cheating husband, and the Feng Shui case of Huang's casino. Su Yun also became a celebrity in the North Bureau, but was jealous of the rival South Bureau. In order to compete with the Northern Bureau, the Southern Bureau invited the Taoist priest to come out and compete with Su Yun in the case of the university champion pool.
