In a world cleaved in two by a massive barrier of perpetual darkness, a young soldier uncovers a power that might finally unite her country. But as she struggles to hone her power, dangerous forces plot against her. Thugs, thieves, assassins and saints are at war now, and it will take more than magic to survive.

When a headstrong street orphan, Seiya, in search of his abducted sister unwittingly taps into hidden powers, he discovers he might be the only person alive who can protect a reincarnated goddess, sent to watch over humanity. Can he let his past go and embrace his destiny to become a Knight of the Zodiac?