Lucifer has shattered Solomon's ancient seal and unleashed the seventy-two demons on the world, targeting every descendant of the king who imprisoned them. Lily, a quiet librarian who only learned of her bloodline when her grandfather pressed the legendary ring into her hands on his deathbed, cannot yet make the ring work. Three earth-aspected demons—among those once sealed alongside Lucifer—break from his command to shield her instead. This earth-element volume follows Lily's six routes with her three ground-element demon companions, completing one quarter of the twelve-route series spanning fire, water, wind, and earth.