The story takes place in the "Silent Valley" on the edge of the "Rhythm Realm". The protagonist Lei is definitely an alien who is born unable to be "recognized" by others. As a "conceptual parasite", he passively parasitizes in the cognition of the old luther master "Zhong Wuhui" in the valley and exists as his imaginary disciple. By chance, Lei Guangjun touched the "Piano of the Eclipse of Time". The sound of the piano reversed part of time and space, allowing him to temporarily gain a physical body, and he also obtained the tortoise shell that concealed the secret of the "Nine Palaces Dunjia". In order to find the meaning of independent existence and get rid of the parasitic state, he embarked on the path of cultivating immortality. In the process of practicing "Sword Sense" and "Dayan Tianji Divine Refining Technique", he met "Yun Wangqing", a Taoist companion who deliberately approached him in order to prove "Tai Shang Wangqing", but in the end they fell in love with each other deeply. He traveled through the trials of seven emotions, climbed the ladder of music, and faced the essence of his own existence in the "Palace of Return to Truth". In the end, Lei Jingjing did not prove the Tao through force, but by reconciling the contradictions between "parasitism" and "independence", "sentiment" and "forgetfulness", "voice" and "xisheng", he reached the perfect state of "unity of nature and man", proving that existence itself is the Tao, and a healthy and complete life state is the foundation of immortality.