Midnight in Seoul. A Class Two spiritual threat — Sugwi, the Water Demon — emerges beneath the railway bridge over the Han River. Yeonhwa, an elite agent of Division 8 (Korea's clandestine supernatural bureau), deploys alone, as always. The last heir of the Seongju Lee clan, she wields the five ancestral elements channeled through the talismanic calligraphy etched into her skin. But in the heart of the battle, time freezes — and the ghost of her eight-year-old self appears. The child asks: "Was