During the Yuanxi period, Shen Qingjun, the chief widower of Jiangning Mansion, discovered the same irrefutable evidence as in his father's unjust death case eleven years ago during an ordinary autopsy. In order to pursue the truth, she had to form an alliance with Gu Yunzhou, a son of a declining family who was good at power. One light and one dark, one law and one government. In the turbulent court and rivers and lakes, the two people work together to clear away the fog and challenge the powerful. In the end, they not only redress the injustice, but also protect the bottom line of law and justice.