During the day, Ryu Hayabusa owns a modest shop dealing in Japanese antiques. At night, he protects New York City as the Dragon Ninja. When the esteemed Dr. Ned Friedman declares at a highly unusual press conference that he has created a flawless cure for cancer, Ryu senses that something is deeply amiss. Together with his reliable colleagues from a small newspaper, Ryu embarks on a mission to expose the sinister truths hidden behind Dr. Friedman's alleged miracle cure.