Yu Xiu, a junior boy, is unwilling to live a mortal life and decides to go to Zhongnan Mountain to practice magic. After several years of hard training, he finally came out. After returning to the world, he changed his name to Arnold, transformed into various identities, played in the world, and met Bai Lang, the Lingshan Walker. Bai Lang came to the world on the order of the Buddha to find the reincarnated demon boy of Xie Shuihan, and brought him back to Lingshan to be purified by Buddhism before he awakened. But it was still inevitable, and in the end Xie Shuihan still occupied the Three Realms. In order to eliminate Xie Shuihan, Yu Xiu and Bai Lang must find the relics passed down from ancient times. While fighting side by side, the two gradually developed an alternative love. Can Xie Shuihan finally be eliminated? And can Yu Xiu and Bai Lang overcome the laws of yin and yang in the universe and stay together for life after life?