The heroine Shen Zhaoxue has been concealed for twenty-eight years, so she became a prisoner in Youjing. On the surface, she investigates the case, but in fact, she secretly traces the truth of the "Tianren Incident"; the male protagonist Xie Jin came to Youjing as a supervisory censor of the capital city because of his adoptive father's instructions on his deathbed. He was called to investigate the case, but in fact he was waiting for someone.
Because of the mysterious death of Goose Opera troupe actor Xiao Yunsheng, the two met, tested each other, and jointly investigated the case, and then the two went from collusion to trust. As the Yan family case, the old blind man case, and the abandoned village fire case progressed, the female protagonist discovered that she was the daughter of the true prince Li Jin, and the male protagonist discovered that she was the son of Xie Yuan. Their fathers were close friends of life and death, and they died together in the "Sky-Cracking Incident" twenty-eight years ago.
Another shocking incident occurred at the altar. The heroine's biological father, Li Jin, showed up to take revenge. The hero had to choose between family affection and morality. In the end, the two chose to stop the explosion and seek justice through the law. After experiencing the sacrifice of her parents, the death of her aunt, and the truth being revealed, the female protagonist shifts from "avenging the dead" to "legislating for the living", and the male protagonist shifts from "maintaining imperial power" to "protecting the new law."
Ending: Three years later, the two used the "Jin Snow Law" to jointly try the world's unjust cases, meet at the Jing Snow Pavilion on the fifteenth day of every month, write love letters in the Hu tribe's code, propose according to the legal provisions, and finally walked side by side into the white snow.
Purpose: Uphold justice, pursue the truth, and wish the world to be clear and bright.