Yue Dong is the youngest paper effigy maker in Jiuzhou, barely making ends meet with his family's ancestral craft. A murder case draws him into the investigation, and he becomes a special consultant for the police station. Using paper effigies to track clues and soul-summoning techniques to solve cases, he unexpectedly uncovers a shocking conspiracy that has been brewing for eight years. An elder sister murdered her younger sister, an Eastern foreign Onmyoji summoned the souls of the dead, the dragon veins were sealed, and his second uncle colluded with the enemy. As he works to unravel the conspiracy, Yue Dong battles evil spirits and protects Jiuzhou. Along the way, he and the sharp-tongued forensic doctor Chen Jiaying go from bitter adversaries to inseparable companions who would risk their lives for each other. Chen Jiaying takes a fatal blow meant for him, sacrificing herself to save him, and he awakens as the mortal incarnation of the Great Emperor of Mount Tai. Facing the resurrected Eastern war god and a million vengeful spirits, he gives up his divine throne and willingly remains in the human world to spend a hundred years by her side.