During the Tang Dynasty, a series of murders occurred in a small town on the border of Xidu, and the people saw a mysterious army transporting treasures at night. Wu Zetian ordered Di Renjie to investigate, and Di Renjie learned that people who had seen the mysterious army had lost their lives one after another,Even the corpses at the scene showed signs of desertification. Young Xia Yuan Si, who came to search for relatives, and Di Renjie, who was caught in a difficult investigation case, joined hands to decipher the mystery. With their joint efforts, a conspiracy to overthrow the Tang Dynasty emergedGradually emerging from the water.