At the end of the Southern Song Dynasty, Quanzhen religion rose in northern China, competing with many talisman schools of Southern Taoism. Li Dan, a feathered scholar of the branch of Longhu sect, was seriously injured and fled due to the attack on his school. He was attached to the fourth son of the commoner of Jia Sidao, the Prime Minister of the Southern Song Dynasty, in order to replenish the Yin essence of the women in the Jia family and restore their skills. He had sexual relations with his mother, his sister, his servant girl, his wife Qin, his beloved concubine Jia (that is, his aunt), his imperial concubine, and his princess (his cousin). After his great achievement, he became a key figure in the dispute between northern and southern Taoism. After that, he met his elder martial sister and sister-in-law again. A battle between Taoism and Buddhism began. During this period, the forces of mingle Mingjiao and Japanese Kendo participated in the competition. The five elements hiding technique, carrying skill, moving technique, land flying skill, immortal sword technique, picking and mending skill, Incantation, palm thunder, Buddhist magic art, etc. were all on the stage. It is a legend of Buddhism and Taoism in the late Song Dynasty.