Lin Jin, a mortal orphan whose engagement was annulled, married Shen Wanzhao, the twin sister of Shen Qingyao, the saint of the Tianji Sect, because of the last wish of his mentor Shou Shan. He seems ordinary, but in fact he is the reincarnation of an ancient sword cultivator, and his bones and blood hide the Immortal Killing Sword that has sealed the catastrophe. Shen Wanzhao looks cold on the outside, but uses human fireworks to calm his loneliness. When Lin Jin's sword cry triggered a vision of heaven and earth, the two gradually fell in love with each other after being treated coldly during their first marriage, and were further involved in a thousand-year fate - the robber master who was sealed by him was about to resurrect, and Shen Wanzhao actually had an unsolved cause and effect with that catastrophe. In the end, the Taoist couple worked together to break the seal, Lin Jin proved the Tao with his sword, and Shen Wanzhao used his life to save his love, rewriting the dual fate of "lonely evil" and "catastrophe".