In her previous life, Su Yu, who had been engaged in the restoration of cultural relics and historical research for ten years, accidentally traveled through time while staying up late to interpret a bronze inscription, and became a concubine princess sent by the Yan Kingdom for marriage. According to the Su family, a centuries-old fate is engraved on ancient inscriptions: All married women will not survive the age of nineteen, and eventually die from poison-quenched silver needles.
Su Yu was ambushed three times on the road to get married, and Su Yu managed to escape, saving the seriously injured undercover guard Mo Ying. After entering the DPRK, she surprised the whole DPRK with her mineral trade plan and was granted a fief in the barren Qinghe County. Everyone in the government and the public waited to see her fall and perish, but she relied on her talents in cultural relic appraisal to mine iron ores, build a trade network across countries, develop water conservancy, mines, and markets, and managed the barren Qinghe County to prosperity.
An ancestral copper ring has early warning capabilities. If the ring heats up, it will indicate a crisis or a turning point. The queen arranged for her spy, Nanny Zhao, to hide poisonous needles and plot against her many times. The princes of the royal family each had their own agenda. The prince of Chu went to Yan in advance, and the princes of the Western Regions met across the sea. All the forces from all sides revolved around Su Yu.
The cold-faced loyal dog silently guards her, the sinister third prince falls for her step by step, the gentle prince treats her as an equal and loves her, and the prince of the Western Region is the only soul confidant who can catch her modern fantasy. Su Yu has a transparent and kind nature, and never takes the initiative to plot against others. She only relies on her vision and body constitution to resolve court conspiracies and quell border wars. Step by step, she uncovered the entire truth about the Su family's blood curse, the massacre of Mo Ying's former dynasty, and the queen's years of assassination, and broke the shackles of the fate of death at the age of nineteen. In the end, she took the power of transnational commerce and became the Qinghe Princess that other countries did not dare to despise, and gained four sincere bonds with completely different styles.
