Who's Poor Now, Ex-Husband?

Nina sells vegetables at a market and has spent seven years quietly keeping her husband's company alive with money he does not know the source of. On their seventh anniversary she finds him with his secretary, and he humiliates her in front of other people. She signs the divorce papers and tells him who she is: the eldest daughter of the richest family in the capital, heir to the Bai group, the fortune he had spent years trying to get near. After the divorce she takes over the group and goes after his company in the market. Her four brothers, all of them in positions of their own, back her, and a fiancé she was matched with also works on her side without saying so. She sets things up one at a time until what he and the secretary had done is in the open, and takes back what she put in.