In a future era, certain individuals known as 'adepts' possess extraordinary 'septimal powers' granting them abilities like flight, wielding energy weapons, and elemental control. Despite a facade of peace maintained by the Sumeragi Group, this powerful corporation actually manipulates and studies these adepts. Gunvolt, a remarkable adept with electric field manipulation skills, allies with the covert organization QUILL to expose and thwart Sumeragi's hidden agenda.