In the autopsy room late at night, candlelight flickered. Su Wanzhao's silver knife cut open the skin of the corpse, but she found a blood-stained jade button in the stomach of the deceased - exactly the same as the one she tied on Xie Zhao with her own hands during the family murder case three years ago. When the secret scalpel of the cold-faced gangster encounters the old case files of the Minister of Justice, behind each corpse is a mystery of power and intrigue in the court. He thought she was just a strange woman among the people, but he didn't know that she spoke for the dead every night; she hated him for handling cases like a god but could not find out the grievances of the Su family, but she couldn't stop the warmth of the hem of his clothes brushing the back of his hand during the autopsy. Blood spreads across Chang'an City. Which one is more deadly, the truth or the heartbeat?