"4001 A.D. - Tohru Nakadai is the 42nd Rai, the spirit guardian of Japan. Infused with the energy of his ancestors and dedicated to the way of the samurai, Rai is sworn to the service of Grandmother - the personified, artificial intelligence that governs the island nation of Japan. For forty generations, Grandmother's benevolent dominion has endured, but in the wake of her sudden disappearance, Rai will become all that stands between his nation and all-out chaos."--Amazon.com.