Li Xiaren, a young man from the modern era, travels back in time to the Great Qin dynasty and becomes the third son of Li Si. He unexpectedly gains immortality and a cultivation manual called the Art of Ascension. Before he can celebrate, he discovers that he is Fusu's childhood friend and study companion, and is publicly branded as a member of Fusu's faction. Yesterday, Fusu angered the First Emperor by openly criticizing the burning of books and burying of scholars, and was sent to the Great Wall to supervise its construction. There are only two years left before the First Emperor's death and Fusu's suicide after receiving a forged imperial edict. Li Xiaren initially plans to flee, but the naive and kind-hearted Fusu first hands him their correspondence, asking him to draw a clear line between them to protect himself. He even leaves him five hundred gold coins and entrusts him with protecting his wife and children. Seeing that Fusu is still trying to protect him despite being unable to protect himself, Xiaren changes his mind and decides to stay. He plans to tell a story about a prince stationed on the frontier who raises an army to quell a rebellion. Meanwhile, outside the door, Ying Zheng is standing silently.