Imprisoned for thousands of years in the hilt of a ceremonial sword, the oni, a hideous Japanese demon, is accidentally released to wreak the havoc of its pent-up fury on an unsuspecting world. All-powerful, immortal, and possessed of an unquenchable lust for human blood, the demon seems invincible, leaving in its wake an increasing number of horribly mutilated bodies.Only one woman has learned the oni's history and the key to its destruction. But will she be able to pit her puny human strength against the demon's murderous powers before she becomes yet another victim?