Mido Continent, a continent of mechanics with advanced technology. But for no reason, a group of mechanics appeared who pursued power and ruled the continent with force, and formed a force - the Lan Empire.
As the apprentice of the top mechanic Rai, Rheas, who was forced to stay in seclusion for five years due to some reasons five years ago, chose to replace the sacrificed mechanics to fight against the Lan Empire.
In this chaotic and dangerous world, step by step, they will become the next generation of top mechanics, stand at the pinnacle of the world's hope, and end the ruthless wars of the past few years. This is what they (they) have to do, it is simple and difficult at the same time, but it will not change.
Concept: No one is an absolute villain.