An apocalyptic game descends, digitizing the world, allowing everyone to change classes. Caden awakens the sole hidden class, [Concept Master], but is misjudged as an F-Rank nobody and faces ridicule. During a demonic tide, he reveals his invincible power, establishes the Exchange of Everything, and provokes global powers to besiege him. He uncovers the truth that Earth is a cosmic prison, rebels against the warden to reshape the universe, and finally retreats into anonymity.