Modern lawyer Shen Qingyan transmigrates into the body of Shen Qingluan, an abused concubine-born daughter in the Great Yan dynasty. Armed with the legal knowledge from her previous life and extraordinary intelligence, she outwits her stepmother and legitimate elder sister, earns an unprecedented appointment as a court official, and brings down corrupt power brokers. From household rivalries to court politics, she and Regent Xiao Heng gradually transform their mutual hostility into love. In the end, the couple stand united, pacify the Northern Di, restore power to the young emperor, and create the legend of a great female chancellor.