Su Yao, a history buff from the twenty-first century, unexpectedly transmigrates into the body of the principal consort of Yin Zhen, the fourth prince during the Kangxi reign. She expects to live cautiously in the confines of a grand household, but thanks to her knowledge of Qing history and her modern outlook, she catches the attention of the cold-faced Fourth Prince.
The battle for the throne is full of twists and turns. Su Yao puts her modern knowledge to use, offering advice as the Fourth Prince navigates a perilous princely residence and then the treacherous court. When she helps him recruit talented allies, rival princes sabotage their efforts. Su Yao and the Fourth Prince face the crisis together, and their feelings grow stronger with each new trial.
After becoming empress, Su Yao pits her wits against scheming consorts in the imperial harem and helps Yongzheng carry out new policies. As Nian Gengyao’s power grows, Consort Nian frames Su Yao in an attempt to save her brother. Su Yao uses her intelligence to overcome the crisis and secure her place on the throne.
In the end, Su Yao and Yongzheng spend the rest of their lives together. Their love story leaves a vivid mark on Qing history, while Su Yao’s tale of transmigration becomes a cherished legend passed down through the generations.