The story follows the legendary Di Renjie, renowned for his exceptional crime-solving skills. After excelling in the imperial examinations, he eagerly awaits his official post in the capital, Chang'an. However, his path takes an unexpected turn when Empress Wu Zetian assigns him to a remote border town. There, Di Renjie is faced with a series of enigmatic cases. Rising to the challenge, he upholds the responsibilities of the judiciary, determined to restore justice and bring peace to the people.