Someone is killing the great martial artists of America. Connor Burke, a part-time college instructor with a passion for the martial arts, is dragged into the investigation by the NYPD. With the help of his teacher, the master warrior Yamashita Sensei, Burke begins to follow a trail of clues that stretches across time and place. Ultimately confronting his own fears, his sense of honour, and the ruthless killer who called himself "Ronin" -Japanese for masterless samurai.