A martial arts instructor working at a police academy 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. Donnie Yen, Charlie Yeung, Baoqiang Wang, Bai Bing, Deep Ng Ho-Hong, Yu Kang, Xing Yu Added on ZEE5 2022-12-05. Added on Amazon Prime 2023-07-26. Youtube Trailer