Swallowed up by the Dark Demon God, the entire Land of the Setting Sun becomes engulfed in darkness, and its denizens begin experiencing bizarre symptoms. Seven days remain before mankind faces total annihilation unless the samurai can break the Dark Demon God's horn. The situation seems dire when Musashi, Kojiro, and the Five Heroic Generals are suddenly warped before the Obsidian Eight! As shocking truths come to light, can the samurai strike a deal to save mankind?!
