Su Yunshang was born into a merchant family and was originally engaged to Shen Zhiyao. After Shen Zhiyao was in high school, in order to cling to the powerful, he regretted his marriage and designed to frame the Su family. Su Yunshang is facing a family crisis and the world's prejudice against the daughter of a merchant. If she cannot successfully fight back, she will lose everything. She is torn between revenge and family reconciliation. On the one hand, she wants to severely punish the scumbag, but on the other hand, she is worried that the family will be divided due to her revenge.
Although Su Yunshang is extremely resourceful, she struggles in the power arena because of her identity as the daughter of a merchant. Shen Zhiyao continues to consolidate his power in the court, leaving Su Yunshang little time to counterattack. At the same time, the rumors spread by Shen Zhiyao caused Su Yunshang to be misunderstood within the family and the outside world. Some people in the family were also bewitched by them and opposed Su Yunshang, forcing her to take sides.
In the predicament, Su Yunshang changed her identity and sneaked into the household department as an accountant, using abacus to expose Shen Zhiyao's corruption. During the process, the mysterious Xiao Jingchen secretly observed and was attracted by her wisdom, becoming her ally. Su Yunshang teamed up with merchants to fight back and set up a trap to ruin Shen Zhiyao's reputation and turn the powerful against him. In the end, Su Yunshang exposed Shen Zhiyao in court, and Xiao Jingchen revealed his identity as a powerful official to help her win. Su Yunshang became a female business legend, ruling the world with Xiao Jingchen, and the two gained love through equal cooperation and mutual help.
