Wumeng Mountain in the north of Saibei and Xihualou in Jiangnan are old enemies.
Five years ago, the elder Wumeng Shanxi died in Xueluan Palace. The person who killed him was an assassin from Xihualou named Xie Yiran, who used a pair of cold and purple swords.
In order to avenge his master, Su Yinyue, the master of Qinghen Sword, traveled thousands of miles to trace Xie Jiran's traces. Finally, on a snowy winter night, in a small inn in a border town, the ghost sword Qinghen and the demon sword Ziji met.
This encounter was not a discussion about swords, flowers, wine and tea, but a scene of swords and blood raining across most of the world.