Mo Xi is the chief swordsman of the Immortal Sect, and he is being pursued for being accused of "killing his master and treason against the sect". Zhaozhuo was forced to go with him to search for the "Pure World Lotus". On the way, he discovered that his memory had been tampered with: the so-called "killing the master" was actually the master using the whole town to make swords. Zhao Zhuo's golden finger reveals the truth, but triggers the curse of the heart-burning fire - every time he uses his power, his heart will burn a little bit. In order to suppress the curse for her, Mo Xi volunteered to share the sword bone to endure the burning. In the end, the two broke into their master's lair, Zhao Zhuo used the torrent of memory to detonate the fire, and Mo Xi used his body as a sheath to contain the explosive flames. He kissed her in the flames: "My bones are your sheath, and your pain is my blade."
