The target of hitgirl Mikura is a wealthy baseball team owner, but he turns out to be a powerful underworld boss. Mikura and her team are beset by countless heavily armed bodyguards and the boss' vicious daughter.

Sawa may seem innocent and naive, but don’t be fooled. She is a cold-blooded killer, and if you’re on the wrong side of the law, you may be her next target. Not content to just watch as the imperfect justice system lets more and more criminals go loose every day, a detective decides to train the young Sawa to be his instrument of justice.

Superior technology may have bloomed by the year 2012, but it has not changed the face of humanity. For young men like Kay, life is still plagued by nothing but homework and girl trouble. When an unknown force besieges Earth with robotic war machines, however, it is Kay who is chosen to defend the human race. In order to activate the super-weapon Devadasy, Kay must find his perfect match. Only one man and one woman together can use the Devadasy, and protect the peace of mankind!

The skill of sword-fighting is known to two tribes, the Tribes of Light (which consists of humans living on the world's surface) and Shadow (largely part-human-part-animal creatures and monsters living in an underground city, who enjoy a lifespan five times as long as the Tribe of Light and age one-fifth as quickly). The two tribes lived in peace and harmony, their domains separated by the "Words Worth" tablet—a huge monolith slab erected by an almighty creator. Although the tablet has writing on it, neither Tribe can read the text. One day, Words Worth was mysteriously destroyed by an unknown entity; its fragments scattered among the domain of the Tribes of Shadow.