When a young Hwa-rim accidentally unleashes Jin—a malevolent snake god sealed away by her grandmother, a legendary master shaman—the entity immediately claims her body. To save Hwa-rim from total possession, her grandmother makes the ultimate sacrifice, trading her own life for the girl’s soul.
Years pass, and Hwa-rim is now a high school student living in constant paranoia, hiding from the ancient spirit that still relentlessly hunts her. But her quiet sanctuary shatters when Bong-gil, a boy from her school, becomes Jin’s newest vessel. Armed with a familiar face, Jin begins to use Bong-gil to draw Hwa-rim out of the shadows…