In his previous life, Shen Duchuan, a criminal officer from the Ministry of Punishment, was falsely accused of collaborating with the enemy because of his pursuit of an old salt and iron case. His whole family was covered in blood at Caishikou. His fiancée Xue Yunjie gave false testimony in court, and his brother Pei Jin collected his body for him but was exiled. Once reborn, Shen Duchuan returned to the three months before the incident - the account books were not burned, the witnesses were not dead, and the butcher's knife was not dropped. He found Pei Jin and exchanged half a jar of strong wine for a promise: "Help me investigate a person, and I will help you lift a net."
