Aetherium, a land full of wonders, known for varieties of races inhabiting there, divided into various nations. In this land magic is considered a valuable resource for nearly everything, until technology appeared, which do the same things as magic do, except, unlike magic which bend the natural law to one's will, technology follows and utilizes it. Leading to the bitter rivalry between mages wielding magic and technologist (normal people) wielding technology.
There was a boy named Kevin, he and his twin sister Clara, have deep bonds with each other, as they were living on there own, ever, since, their parents died. One day, due to their different goals, that is, Kevin's goal to become famous technologist and Clara's goal to become powerful mage, they had to leave each other, though they still cared for each other as they don't share the shame prejudice that other mages and technologists had for each other and always exchanges letters.
After the Kevin's graduation in institute of technology, he found that his sister's letter stopped coming, at first, he thought, that her sister may be busy, but after three months, he felt something is wrong, thus, with permission of ministry of magic, he went to institute of magic where her sister studied here he learns that her sister graduated same day as him and then she suddenly went missing, even her friends and classmates have no idea, this cause Kevin realise that something is definitely wrong.
After some investigations, he learns that his sister was last seen in flying magic ship, going towards a major city named, Terre Sainte, a holy city of both mages and technologists. Kevin decides to go there, to find his missing sister, while completely unaware that he will become tied to a deep conspiracy that will endanger the entire land.