Max Keller meets up with John Peter McAllister, an American who having remained in Japan after World War II, became the only occidental American ever to achieve the status of the Ninja. Having returned to America to locate his newly discovered daughter, he agrees to tutor Max in the ninjutsu arts, while helping a father and daughter fend off an unscrupulous land developer who is trying to get a hold of their airport. (thetvdb.com)