Qi Xing, a history graduate student in the 21st century, touched a Qin Dynasty bronze sword in a museum accident, and his soul traveled to the streets of Xianyang in 221 BC. At that time, Qin Shihuang had just unified the six kingdoms, and the world was initially settled, but undercurrents were surging. Qixing managed to gain a foothold by relying on modern knowledge, but during a hunt, he fell into the secret realm of Lishan Mountain and mistakenly ate the ancient fruit "Eternal Life Fruit", thus gaining immortality.
For more than two thousand years, he traveled through various dynasties in different capacities: in the Western Han Dynasty, he witnessed the melodious camel bells of the Silk Road, in the prosperous Tang Dynasty, he was drunk in the fireworks alleys of Chang'an, in the late Song Dynasty, he witnessed the tragic shipwreck of Yashan, and in the troubled times of the Ming and Qing Dynasties, he witnessed the change of dynasties. He was once a guest of literati, and he was also an unknown soldier who shed blood on the battlefield; he has protected a cultural heritage that has been passed down for thousands of years, and he has also witnessed a civilization burned by war. Immortality gives him endless time, but it also leaves him burdened with the eternal loneliness of losing his best friend and turning his lover to ashes.
As the wheel of history rolls into the 21st century, Qixing stands on the familiar yet unfamiliar urban streets, watching the past he has personally experienced become museum exhibits and history books. He thought immortality was a gift, but in the end he discovered that only the fading warmth in his memory was the only antidote to the desolation of time. The bronze sword that allowed him to travel back in time reappeared in modern times, hiding the ultimate secret about immortality and time travel.