In modern society, Lin Weiben, a graduate student in the Department of History, leads a step-by-step life. However, an accident caused her soul to travel through time and space to the prosperous Kaiyuan era of the Tang Dynasty, and she possessed Shen Ninghua, the concubine daughter of the famous Prime Minister Zhang Jiuling.
The Prime Minister's Mansion is very hierarchical, and Shen Ninghua is gentle and well-behaved on the surface, like a rose growing against the wall, blooming quietly but without being ostentatious. But deep in her heart, there is the unique independence and wisdom of the modern soul, like a deep pool, with undercurrents surging beneath the calm.
With the rich historical knowledge in her mind, Shen Ninghua was keenly aware of the upcoming Anshi Rebellion. Instead of waiting for death, she used what she had learned to respond proactively. She improved arithmetic teaching with modern educational concepts, making arithmetic no longer difficult to understand, like spring breeze and rain, nourishing the hearts of students; she also vigorously promoted the innovation of agricultural tools, making work in the farmland more efficient, as if injecting new vitality into agricultural production. These measures made her famous in Chang'an business circles and became the focus of attention.
In an arithmetic debate, Shen Ninghua met Su Mo, a scholar from a poor family. Although Su Mo was born into a poor family, he had a passionate thirst for knowledge and lofty ambitions. The two had a heated debate on arithmetic issues, and the sparks of their thinking continued to collide, like the twinkling stars in the night sky. As their contacts increased, they gradually developed from an initial confrontation of ideas into confidants who supported each other. Together, they faced the pressure from their aunt, Liu, who, as a representative of the conservatives, was extremely dissatisfied with Shen Ninghua's new ideas and measures, and always tried her best to make things difficult for her; they also shared the responsibility of being the son of the family.
