Feudal Japan - a time of danger, intrigue and deception. Jubei is a masterless ninja who travels the land alone, hiring his services to those with gold... or a worthy cause. His fearsome abilities have served him well, but a hideous plot to overthrow the government threatens to end his wandering ways - and possibly his life. When a small village succumbs to a terrible plague, a team of ninjas are sent to investigate, and realize that all is not as it seems. Ambushed, they are wiped out by a fearsome man-monster with incredible powers, leaving only one alive - Kagero, a beautiful female ninja, whose touch can bring instant death. Jubei saves her from a fate worse than death, and unwittingly becomes drawn into the web of treachery. He is soon faced with his greatest challenge - an enemy for whom death holds no fear, with the power to destroy Jubei's world. It's an all-out bloodbath when ninja warriors come face-to-face in this action-packed tribal war.

As the story starts there is a mysterious plague sweeping through the countryside and Shimota village has already been annihilated by it.

A team of Ninja known as the Koga ninja Team are sent out to investigate the deaths, but before they can reach the village they are ambushed in the trees by an amazingly powerful enemy in the shadows, and all savagely mutilated... except one. A female warrior named Kagero.

She is taken by their attacker only to be saved by our hero, Jubei. She thanks him and pretends to be strong and indifferent, but after he leaves, Kagero's pain is shown. Through out her entire life she has been treated as nothing more than an expendable warrior... living in a world void of emotion and overflowing with pain.

In turn for Jubei saving Kagero (and later dispensing of her attacker) the rest of the Devils of Kimon come after him and he is unwillingly hired by a shrewd old ninja spy named Dakuwan. Together, Dakuwan and Jubei end up teaming up with Kagero to battle these demons with super-human abilities.

As more information is revealed the plot becomes twisted and the blood just seems to fall like rain ! The ending is quite good, but I don't think I'll spoil it for you readers.  If you haven't seen it, and you enjoy anime on a more violent, bloody and gory side, I recommend this one for you highly.