For fifteen years in the countryside, she was an ordinary girl from Qingshi Village who washed clothes by the river. Then, in a single day, she returned to the capital as Shen Qingci, the legitimate daughter of the Duke of Zhenguo's household who had been switched at birth.
The marquis's household is a maze of danger. Her stepmother is a hypocrite, her half-sister vicious, and her birth father cold and indifferent. She advances with careful steps, using the resilience and wit forged in the countryside to face-slap those who scheme against her and expose their plots. Meanwhile, undercurrents swirl through the court: the chancellor monopolizes power, the princes vie for the throne, and the Xiongnu lurk at the borders. Carrying the secret of her descent from the previous dynasty, she outwits powerful ministers and stirs up the political world.
She happens upon Xiao Jinghan, an iron-blooded minister burdened by his family's blood feud. Cold and taciturn, he devotes himself to protecting her alone. From their first meeting in the capital to standing side by side on the battlefield, from feelings quietly taking root to depending on each other through life and death, they join forces to thwart a palace coup, quell rebellions, and repel foreign enemies. Amid political intrigue, they remain devoted to each other; amid flashing blades, they defend their country and its people.
The imperial jade seal's secrets are revealed, and her true identity comes to light. She transforms from a country girl into the Grand Princess who protects the realm. His achievements inspire fear in the throne, and suspicion grows between ruler and subject. He rises from Marquis of Dingbei to Regent King. Beneath the splendor of a prosperous age, danger lurks. With iron resolve, they secure the realm; with tenderness, they protect one another. And at last, in peaceful times, they write an epic tale of holding hands and growing old together.
