In ancient times, people often interacted with monsters, and the two fought endlessly. Because humans were weak, they were at a disadvantage in the war. The latter person accidentally got four demon-slaying swords, named Bai, Baolongmaru, Hanqie, and Fangya. The four swords were made from the body of the demon. The user should gain power at the cost of his soul. Because many of them were short-lived, they were called demon sword ghosts and built the demon sword studio. In an accident, the 143rd generation master received instructions from the World Tree to help the Yang God defeat the Yin God. Lies and pain are intertwined, death and hope sing together, and the story of the last generation of Yao Touzhai and the girl begins.
