The art of the ninja is not just an Eastern martial art; it extends far beyond that. A warrior who masters his body, who simply vanishes into thin air — that's what a professional ninja is. Stealth, a cat-like gait, eagle-eye vision, and animal instinct — all this helps him survive in any situation. Even if the enemy notices his presence, a fighter armed with a katana will fight to the bitter end — desperately and mercilessly. The enemies of a young man named Ryo Hayabusa left him no choice. They murdered his family, thus signing their own death warrants. The hero is forced to embark on a very dangerous journey, culminating in merciless revenge. The path to his tormentors is not so simple. All the threads of the crimes lead to the Holy Emperor, who rules the surrounding lands and has an entire army of bodyguards. To challenge him, Ryo Hayabusa must prepare thoroughly...