Synopsis

The grandfather explains to Taeyeon his history as the Demonic Spirit King, detailing his initial arrogance, the tragedy that led him down a path of revenge, and his eventual possession by the demonic spirit. He clarifies that Taeyeon's father, Jihan, ultimately absorbed the demonic power and sought to protect Taeyeon from the hereditary curse. The grandfather reveals key elements needed to control the spirit: the Ancient Spirit Jade, the Black Demon King’s Fundamental Breathing Technique, and the complete awakening of the demonic spirit treasure.