In a world where fossil fuels can no longer be extracted from the earth, the continent of Cruzon. The power source people have "chosen" to make all things move is the "power" that dwells within their hands. The "quartz" mined from beneath the earth responds to commands from anyone, regardless of the strength of their power, and people refer to this force as "magic." In such a world, Rygart Arrow, a rare individual "without magic," is one day summoned by his old friend and current king, Hodr, to the royal capital. There, Rygart will learn a shocking truth... The four who once studied together and forged a strong bond of friendship—Rygart, Zess, Hodr, and Sigyn—will be mercilessly swallowed by the whirlpool of war.