The story takes place on the vast land of Kyushu. In the ancient jihad, Yu Zun, the head of the demonic way, was defeated. The righteous way sealed the seven souls of Yu Zun in seven different places, but the three souls may be sealed by Yu Zun before his death. In the Mo Yu sword, and the whereabouts of this sword is still unknown, and both good and evil are willing to spend their lives to find this sword.