It remains as true today as it did in the days of the ancient Samurai: the weapons of the Ninja hold legendary powers for both good men and evil. The deadly weapons of the last Koga Ninja have now been entrusted to an American Ninjutsu student studying in Japan. Commanded by his Sensei to return to New York and protect the weapons at all cost, he must defeat the skilled Yakuza assassins hunting him and prevent the power of the weapons from falling into evil hands.