Su Jin'an is transported into a book as a minor character who won't survive three chapters: a peddler with no parents, making a living by trundling a battered handcart from street to street.
Yet she somehow turns her bit part into a life fit for the chosen one.
She finds a bloodied man by the roadside, only to discover that he is a powerful and ruthless Hanlin scholar who smiles at her with surprising warmth. In a bamboo grove, she rescues a little girl from kidnappers, who turns out to be the legitimate daughter of the Minister of Revenue. The girl becomes her devoted confidante. In an alley, she saves a child from being trafficked, only to learn he is the young son of the Grand Tutor. The entire Xiao family owes her their lives.
The favors she casually records in her ledger later become her lifelines.
But she never expects these good deeds to thrust her into the heart of a maelstrom. The Earl of Yongchang's household tries to silence her, and an imperial decree summons her to the capital. She becomes a companion to a frail princess, only to discover that someone has been poisoning the girl for three whole years.
The man she once saved asks her, “Would you like to turn this whole world upside down with me?”
It takes Su Jin'an three years to rise from a street peddler to the wife of the most powerful chancellor in the realm. When someone asks her how she did it, she smiles and opens her battered ledger. Every debt recorded inside is proof of the strength she built with her own hands.