Jiang Ci's father was framed by the Cui family and died tragically. In order to overturn the case, she disguised herself as a man for ten years and went from county school to the top of the exam. She hid her gender, fought against powerful people, investigated old cases, and became an official based on her talent. With the help of her mentor, she formed an alliance with Pei Yuan. After going through plots and life-and-death crises, she finally uncovered the shocking conspiracy of the Cui family to collaborate with the enemy and embezzle military supplies.