The characters discover a hidden message attributed to King Sejong, detailing his attempt to create a runic power system to empower humans against immortals. Meanwhile, Damdeok is reprimanded by a powerful immortal for his recklessness in a recent incident, accepting punishment despite his efforts to protect mortals from a rampaging entity. Hanyul is also facing disciplinary action. The chapter ends with the revelation of a new threat, an organization using a dangerous ritual.