When Tessa and her best friend Leslie take a trip to Japan, their lives are turned upside down when an accident in a shrine reawakens an ancient water god from his 500 year slumber. The incident sends them careening into the Celestial Realm -- the land of the gods-- where everything holds a sleeping power of its own. Separated and in danger of falling victim to the power of the realm, Tessa unwillingly allies herself with the cold and distant Ren, and sets out on a cross-country rescue mission to save her best friend. But, an even bigger threat looms as something dark and dangerous lurks in the dark recesses of the Realm and threatens to destroy the world as they know it.