watch Kung Fu Killer full movie online HD 123movies, $title full movie online Gostream plot:A vicious killer, Feng, is going round Hong Kong killing top martial arts exponents, leaving a secret weapon called the Moonshadow as his calling card. A martial arts instructor from the police force gets imprisoned after killing a man by accident. But when a vicious killer starts targeting martial arts masters, the instructor offers to help the police in return for his freedom..