Yan Yu, a top graduate student in the Department of Physics at Yenching University, accidentally traveled to the Yong Dynasty during a particle collision experiment and became the third young master of the Yan family. Facing the unfamiliar ancient world, he relied on modern physics knowledge and rational thinking to counterattack step by step from a "country boy". He used the principle of leverage to open the door of the royal treasury, won the emperor's appreciation with improved farm tools and weapons, and finally married Princess Yongning according to the decree. After his marriage, he fought fiercely with conservative forces in the court, cleverly integrated physical knowledge with ancient civilization, and promoted comprehensive reforms in agriculture, military, and commerce. From the youthful days when he first entered the court, to his budding talents, and then to his domineering power as he rose to power, he used science to change the fate of the dynasty, and he and the princess went from misunderstanding to deep love, jointly interpreting a legendary story intertwined between ancient times and modern times, science and power.