Ninja Gaiden

By day, Ryu Hayabusa is the owner of a simple shop selling Japanese antiques. By night, he defends New York City as the Dragon Ninja. When the respected Dr. Ned Friedman announces that he has developed a perfect cure for cancer in an extremely bizarre press conference, Ryu knows that something is very wrong. Along with his trusted associates who work for a small newspaper, Ryu sets out to uncover the dark secrets behind Dr. Friedman's supposed miracle cure. [Written by MAL Rewrite]

The Ninja Ryuukenden anime is a sequel to the first entry of the Ninja Ryuukenden series of video games.