The story takes place in the "Zishui Realm" among the twelve earthly branches. The protagonist Yue Boyuan, a hybrid with the blood of a deep-sea mermaid and a Jiaotu mythical beast, was forced to leave the deep sea due to conflicts between land and sea. At the "advanced age" of forty, he accidentally purchased half of "Taiyi Zhuling Spirit Record" in Lushangfang City, and has since embarked on a completely different path to immortality. He possesses the "Jiao Tu Guardian Bloodline" and has absolute defensive capabilities, but his practice is slow because of this. In the process of practicing "Tiangang Disha Sutra" and "Taihe Guizhen Step", he met Ling Xuzi, a reformist sword cultivator, and Su Wan, a descendant of treasure hunters, and got involved in the whirlpool of inheritance disputes and treasure collection. In order to repair the broken Taoist foundation caused by forcibly practicing the "resentful spirit evil path", he must find the "Zhou Tian Shen Zhao Pill" and face the karma caused by using the "Karma Fire Nirvana Pearl". Yue Boyuan traveled through the earthly realms with different speeds of time and space, and personally experienced the "time of immortal cultivators" - in some realms, only a blink of an eye after being in seclusion for hundreds of years, while in other realms, time flies. In the end, in the ultimate mystery of "the earthly branches unifying", he did not pursue the eternity of power, but found the "road destination" of balancing land and sea, reconciling the old and the new, anchoring his own existence in the flowing river of time, and becoming a watcher rather than a master of time and space.
