After being expelled from the family tree, Shen Jiming did not seek to return to the clan. He only relied on his writing skills to get involved in an old case that had been covered up for fifteen years. Chengpu Salt Fire, Lidi White Notes, and Imperial City Old Records, three seemingly unrelated clues, all point to the same document chain that has been repeatedly rewritten by power. She used paper evidence, physical evidence and witness statements to find out the truth. She gradually became a female official from a local agent, and established a civil evidence department that allowed ordinary people to submit certificates, appeal and preserve evidence. But the closer she got to the truth, the more she discovered that her father, mother, chief minister, and Prince Jing had all made choices for others in the name of "protection." When the truth affects family ties, power and emotions, she still has to write down every transaction clearly.