Su Jianan, a modern woman who was twenty-eight, divorced, and content to lie flat, unexpectedly transmigrates to the Great Jing Dynasty and becomes a prime minister’s daughter. She first meets Xiao Yufan when he is still the crown prince. From their first encounter to growing close and standing by one another, she uses her modern perspective and wisdom to help him enact new policies: building schools and opening border markets so Han and Xiongnu people can live together in harmony; distributing high-quality seeds and building canals across the country to ensure people have enough to eat and wear; and establishing schools for women and public clinics to break with old customs and improve people’s lives. From crown princess to empress, Su Jianan stands shoulder to shoulder with Xiao Yufan, safeguarding peace with the ideals she has always held and nurturing a flourishing age through her actions. In the end, the two build a prosperous Great Jing together and find sincere love that transcends time, along with a peaceful life.