Immortal giant Li Qingyun was betrayed by his best friend Zhang Hao, and they both fell into the Zhuxian formation, but unexpectedly reborn - Li Qingyun returned to the day when his sect was destroyed when he was a boy, bound to the "Dao Guiyuan System", determined to protect his fellow sects, avenge blood, and reach the top; but Zhang Hao was reborn as the Zhuxian Sword, the first killing weapon in ancient times, awakened the "Zhuxian Weapon Spirit System", and became the sword of his former enemy. One person and one sword, the two systems are bound. The grudges in the past life are hard to eliminate, but in this life they are dependent on each other. They not only have to struggle to survive in a troubled world where monsters are rampant and sects are strife, and unlock the magical power of the system and the secret power of the Immortal-killing Formation, but they also have to uncover the shocking secret behind the betrayal and the ultimate truth about twin lives. From being suspicious of each other to working together against each other, people and swords coexist, and they reverse the path to immortality. In the end, Qingyun will shine again, and Zhuxian will prove it!