Edo Era, the world of the Tokugawa Shogunate. There were those who crept in the darkness. The Hiruko Ninja. They are fated to live in darkness, and die in darkness. However, if the power of the Dragon\'s Jewel, which has been handed down among the Hiruko since ancient times, is combined with that of the Priestess of Light, even the Hiruko can be bathed in light. There was one who, believing this, ran away from the Hiruko. And thus begins our story. At the same time, a group of ninja called the Kimon Shu began targeting the stolen jewel as well as the Priestess of Light, who was living in a hidden village. The Kimon were working behind the scenes to bring about a revival of the Toyotomi. What is their intent? As the mystery deepens, the grand battle between the Hiruko and the Kimon over the treasure begins.