In the middle and late Tang Dynasty, Chuchu, a girl from a family of coroners in the southwestern mountainous area, came to Chang'an alone to realize her dream of becoming a coroner. She took the coroner examination and met Xiao Jinyu, the Prince of An, who was a god at solving cases. Xiao Jinyu recruited Chuchu as a coroner partner to uncover the mystery of the case. The mystery of Chuchu's life experience caused a thousand waves, breaking the balance of power among various parties in Beijing, and a power struggle of open and covert struggles ensued. As the cases were solved one by one, Chuchu and the team composed of the prince and others gradually uncovered the mystery and finally solved a shocking case that lasted for 18 years. Xiao Jinyu and Chuchu got married smoothly, and Chuchu was finally recognized by the emperor and obtained the identity of "Imperial Coroner" personally granted by the emperor, realizing her life ideal.