Lin Yan, a young man who was put out of business, unexpectedly obtained half of a mysterious ancient Pisces jade. Every time he was young, he would exchange souls with Su Qingyuan, a female detective from the Dajing Dynasty. One uses modern criminal investigation ideas to repeatedly solve strange cases in ancient county offices, while the other collects thousands of secrets in the future and joins forces across time and space to investigate cases. As a disappearance case was dug deeper and deeper, they were shocked to discover that the unjust case of each other's parents and the secrets of millennium cultural relic smuggling were actually tied to this Pisces jade pendant. The yin and yang jade pulls the fetters of fate, and the ancient and modern threads intertwine with the shocking conspiracy. On the way to investigate Zhaoxue, two hearts that have been separated for thousands of years gradually get closer.
