Xing Yingyuan, a doctoral student in engineering, mysteriously transmigrates on the Xi’an City Wall and becomes a destitute orphan in the Great Sheng Dynasty. Faced with a struggle for survival, she reveals her “technology tree”: making perfume, refining steel, producing cement, and more. She only wanted to make money and lie flat, but accidentally becomes famous throughout Chang’an and catches the attention of the Seventh Prince, Yun Kaiji, rumored to be “neglecting his proper duties.” He offers her unlimited resources and absolute protection, inviting her to join him in plotting a sweeping revolution. From then on, she wows the world with wondrous inventions, while he uses strategy to secure the realm. When modern thinking collides with ancient royal power, the two join forces to build the most unscientific golden age imaginable.