The world is thrown into chaos as dungeons appear and transform homes and schools to monster lairs. Those who are chosen by The Voice become the first wave Initiates who gain the power to level up, use supernatural skills, and invoke the Class Tree, allowing them to become archmages, swordsmasters, and pathfinders.

They conquer dungeons and seize the World Crystals to create safe zones as havens for humans or as kingdoms for them to rule. Three years have passed since then. Sid, a boy not chosen by The Voice, become The Uninitialized.