Hao Yu, a professor of modern materials science, died suddenly due to overwork in scientific research, but was unexpectedly reborn as the son of Wai Lang, a member of the Ministry of Water Resources during the Zhenguan period. With scientific and technological knowledge that transcended the times, he quietly sold improved lead glass and precision balances in Chang'an West City, using "wonderful skills and ingenuity" as a guise, trying to sow technological fire in the soil of the Tang Dynasty.
However, his maverick behavior aroused the jealousy of Li Chonghui, the son of the Minister of Justice, and he became involved in the conspiracy vortex of the mysterious killer organization "Pangolin Society". When the West City was attacked, he used glass fragments to repel the killer; in the Guozhou kiln, he saw through the traitor's plot and joined hands with his maid Qingyuan and Pei Zhaoxue, the daughter of the Guozhou governor, to establish a "Tiangongfang" using the rich local mineral veins to improve the glass craftsmanship and develop new weapons.
When Emperor Taizong was at a loss for his personal expedition to Goguryeo, Haoyu presented his telescope and steam warship designs, and was reused with his astonishing skills. But above the court, political enemies are constantly attacking each other; at the front of the battlefield, Goguryeo is stubbornly resisting with its glazed arrow tower and mysterious poisonous arrows. In the wave of the times where technology and power are intertwined, and war and civilization collide, can Haoyu rewrite history? What kind of love-hate entanglement will he, Qingyuan, and Pei Zhaoxue create in the flames of war?
