Dark Lord of the Don Kurai Dark World plots to dominate the human world. In the movie, there exists a dark legend of the "Hero", the darkness Uchiharau, as well as the "three treasures”—one of which is the stolen "tak of copper”. A man who is knowledgeable about this plot of the Dark Lord is sent to the human world to find the remaining two treasures—"the shield of silver" and "golden sword."