Finalgate (1991)

Liang Kwok Tao (Derek Yee) gets ambushed one night by a group of rogue cops acting outside of the law to nail drug dealers. Seeing his wife shot and only able to rescue one of the kids, it turns out the attack was made on the wrong house and Liang now plots his revenge when the police can't help him. Doesn't hurt he's an explosive expert too... www.sogoodreviews.com