Su Yunqing, the daughter of a businessman, disguised herself as a man and was admitted to the shogunate of Gu Linchuan, the most iron-faced chief minister in the court, in order to investigate her father's unjust case, and became the only female master under his command. Above the court, with her extraordinary logical thinking and eloquence, she battled with scholars, solved unsolved cases, and repeatedly made extraordinary achievements. She gradually grew from a despised "little girl" to the "first female staff member" who was feared by both civil and military officials in the court. Under the court, she slowly melted the heart of Gu Linchuan, the chief minister of Bingshan, with her warmth and wisdom. The two went from being pure superiors to being tacit partners fighting side by side, to being close lovers who protect each other. When the truth of an old case surfaced, pointing to royal secrets and the biggest black hand in the court, the two teamed up to set up a trap to clear out the government and the public. In the end, not only did their father Zhaoxue, but they also worked together to create a prosperous Qingming era, creating a legend of a sweet officialdom with "the master at the top and the chief assistant at the bottom".