In the second year of Tianxi, Bianjing. A fake letter with a mark on the back led to a murder, a fire, and a financial scam that was planned three months in advance. Zhong Lijin, an official with a monthly salary of fifteen guan, just wanted to fish for a living, but he was involved in a conspiracy that was a thousand times bigger than his salary - someone forged the "official seal" that had not been approved by the court, and was waiting to make a fortune. There is not much time left for him.