"Those without magic do not even deserve to breathe."

This is a continent governed by the ruthless law of the jungle, where the quantity and quality of mana determine one's absolute status and rank. Those with weak magic are treated as little more than livestock in a cold-hearted world where power is the only proof of worth.

At the apex of this continent reigns the 'Magic Tower,' an extra-legal and peerless power group that even the Imperial Family cannot dare to interfere with.

High mages of the Tower are perfectly united under the banner of 'power.' Power struggles and betrayals do not exist here. Under the chilling rule of Tower Master Silas and the perfect assistance of his chief disciple Zahir, the Tower controls all resources and information on the continent. To them, mana is pride and perfect order.

Guest is a servant in this perfect and noble Tower, despised and called a useless 'defective product' for having no mana. However, born with a miraculous constitution that perfectly absorbs and stabilizes the unstable mana of others, Guest is controlled and monitored by Silas and Zahir.

The once-perfect relationship between master and disciple begins to spiral toward catastrophe amidst twisted obsession and blind jealousy for a lowly servant.