The King of Western Xia has a precious robe called "Bi Luo". It is said that "Bi Luo" can help mortals ascend to heaven. On the birthday of Emperor Song, Western Xia presented it as a gift. The King of Liang, the envoy of Chengyun, became greedy and put on the precious robe, but he didn't expect that his soul would be drained away by the precious robe in public and he died in an iron coffin. The Emperor of Song was furious and ordered Song Ci to find out the truth. Did Western Xia have the intention of rebellion or did the precious robe really seduce the soul? During Song Ci's investigation, people were seduced to death by the precious robe. The case is full of twists and turns. Is the precious robe "Bi Luo" a fairy robe that can help people achieve enlightenment or an evil thing that seduce people's souls, or is human nature comparable to ghosts? Song Ci is facing a dangerous case and pressure from various forces. Can he break through the fog and see the blue sky? See how to solve the mystery and clear the case.