Ninja Warriors plot
"One man defied them. He is a Ninja, he must die!"
Steve, a ninja, is called in by the police to help them with their investigation. Together with Police Lieutenant Kevin, he investigates the break-in at the Federal Research Institute, where seven ninja fighters managed to steal essential documents despite heavy security. Kevin suspects that a Japanese garden he previously visited with Steve may be the headquarters of Kurodo and his ninjas and sets out to find evidence. However, he is caught, tortured and killed. After Kevin's disappearance, Steve opens the attack and battles Kurodo and his ninja warriors to get the documents back.