When Su Jin woke up, she became the most inconspicuous concubine of a Yangzhou salt merchant.
The biological mother Liu was slowly hanged by fake medicines by her aunt Wang, and she coughed for half a year until she could only breathe. She herself had to be married to Wang Juren, a 53-year-old man from the east of the city who had killed three wives in exchange for a betrothal gift.
Having worked as a public relations director for ten years in her previous life, she is best known for settling accounts and forbearing.
With a bowl of medicine residue mixed with bitter wood, she opened the door of Wang's main hall without making any noise or fuss. She just spread the medicine residue on the table and took the birth mother's medicine into her own hand.
Using an old account book left by the Liu family, she followed the clues and found out the entire chain of dressing changes between the Wang family - Cuiping - Jirentang, and also instigated the rebellion of Wang's maid, Wan Cui.
She thought it was just a house fight, until her grandfather's old cases came to light - the salt administration case, the censorship, the frame-up, and the extermination of the family twenty years ago. Behind them stood the interests of the chief minister of the cabinet and the entire court.
And the down-and-out flower scout Lu Yan, whose life she saved, held half of a dragon-patterned jade pendant that matched his grandfather's relics. The grandfathers of the two families investigated the salt policy case together and were killed together.
The time-traveling concubine Su Jin × the reborn legitimate daughter Su Wei, one has been pretending to be a fool for twelve years and is good at calculations, while the other is carrying on with the memories of her past life.
From a corner of Yangzhou to the world of salt, she wants to take back her mother's life, her grandfather's injustice, the Su family's property, and the justice of the court.
She doesn't believe in fate, she only believes in the abacus and account books in her hands.