There are metal cadbots on Earth that are living by transforming them into beacles, hiding stagnation. The protagonist Jun accidentally gets Metabres in his hand, and gets caught up in numerous events with Bluecap... Can Lee Yeon-jun seal the metal cardbots scattered on Earth?

There were 12 statues symbolizing the 12 wisdoms to keep the world in peace. However, the evil ‘Muspell’ corrupts the 12 statues into Takers and colors the world with the power of darkness. Now the only hope for restoring peace is the Mask Masters, those chosen by the Mask to protect heaven's wisdom!