The heroine entered an aristocratic academy as the daughter of a merchant and was scorned and excluded by her classmates. However, she relied on her superb "arithmetic" and "account auditing" skills to break through time and time again in the "Flower Court Meeting" and "Autumn Examination" hosted by the academy. She gradually discovered that everything in the academy was a trap - including her admission qualifications. The emperor needed someone to enter the capital's core interest network, and she was the seemingly inconspicuous "chess piece."