When a plague of supernatural disasters afflicted their world, a sacred ritual took place that turned everyone into immortal beings. In exchange for their immortality, no one could use their elemental magic anymore. Also, the people permanently lost one of their five senses. Hae arrives at the infamous Aether Castle: The home of the ritual itself. Within the dubious realm of Aether, Hae discovers the secrets of the world when he encounters a mortal girl.