The male lead, Li Huaixu, is immortal. He has existed in this world for as long as he can remember. A peerless martial artist, Li Huaixu roams the land, helping the righteous and punishing the wicked. During the Spring and Autumn and Warring States periods, he believed himself chosen by heaven and wanted to bring peace to the world. But after living for thousands of years, he came to feel that life drifted by like water, and that it had all been a dream. Over the centuries, he had many close friends and lovers, but never any family of his own...
**The Tang Dynasty: The Contracted Son**
The male lead, Li Huaixu, is immortal. The story opens in the Tang Dynasty, where Li Huaixu meets Pei Xin, who has transmigrated to the State of Qin. He realizes she is the woman from long ago who vowed to change the patriarchal society.
**Spring and Autumn Arc**
Li Huaixu and the ambitious Li Yi work together to reform the martial arts world and establish the Changshi Sect. Li Yi betrays him and schemes to accidentally kill Fanyue. Li Huaixu takes revenge and kills Li Yi, exposing his secret of immortality. He establishes the Yitian Alliance and goes through many trials, eventually watching his friends pass away. Wanting to die, he saves Ying Zheng.
**State of Qin Arc**
After learning that Li Huaixu once saved him and discovering his secret of immortality, Ying Zheng searches for him. Pei Xin attempts to assassinate Ying Zheng, but is killed instead. Disillusioned, Li Huaixu reaches a nonaggression agreement with Ying Zheng and retreats to a life of Daoist cultivation.
**Han Dynasty Arc**
Liu Bang meets Li Huaixu and urges him to help. After the Han Dynasty is stabilized, Liu Bang suspects Li Huaixu is immortal. His research yields nothing, and fearing Li Huaixu could threaten the dynasty, he uses a secret method to seal him in ice.
**Tang Dynasty Arc**
Li Bai awakens Li Huaixu, and they roam the land together, helping the righteous and punishing the wicked. After Li Bai is exiled, Li Huaixu goes looking for him and encounters Pei Xin's transmigration. He wants to put an end to his immortality. Unaware of Li Huaixu's identity, Li Bai stops him from casting the spell, losing his own life in the process. Later, Li Huaixu loses his immortality...
Theme: In this world, we are but travelers passing through
