Hitomi Kanzaki is a fifteen-year-old who runs on the school track team and dabbles in reading tarot cards for fellow students. When one vision comes true, Hitomi finds herself whisked away by a young samurai dragon slayer to a foreign world where the moon and the Earth hang in the sky.

In Gaea, Hitomi finds her prophetic powers growing stronger and she is pulled into a conflict created by the Zaibach Empire who want to revive the powers of the lost civilization of Atlantis.