In the near future, in a nation unknown... Humanity has entered a new age where the majority are now “Adepts” — people who possess supernatural powers known as “Septimas”.

Humans who do not have Septimas, known as “Minos”, are being hunted and executed by the “Institute for the Promotion of Human Evolution ‘Sumeragi’”.

Among these Minos, whose everyday lives have turned into a living nightmare, there was an urban legend spoken of only in hushed tones: tales of the “Luminous Avenger iX”. It was a rumor of a warrior clad in pure white armor, accompanied by the Muse of Hope, Lola, who fought for the sake of all Minos —

This story begins when the Luminous Avenger iX, or “Copen”, encounters a lone girl.