Lo Wang is an assassin who works for the powerful Japanese industrial magnate, Orochi Zilla. He is sent to purchase an ancient katana from a collector named Mizayaki for 2 million dollars. Mizayaki refuses the offer and Lo Wang tries to take the sword by force, killing his men in the process. Lo Wang is captured when Mizayaki reveals his bond with a demon named Hoji, and is caged, but escapes when demons attack the compound. Mizayaki is killed in the attack and Lo Wang allies himself with Hoji in hopes of retrieving the sword. Hoji explains that the Nobitsura Kage, as the sword is called, is capable of slaying immortals and is anathema to demons. He also mentions that the Nobitsura Kage is actually three swords, and so Lo Wang seeks them out to merge them into one.