老刑警吴济堂枪击拒捕逃犯王彪，却误伤人质受到处罚。女儿遭强暴，他一怒之下又抓来劳改释放的王彪，可王彪又非作案者。王彪妻对吴济堂设下女人圈套，使吴遭受不白之冤。被停职检查。女司机遭劫，吴济堂奋勇相救，遭到罪犯枪击，生命垂危……

Wu, a veteran police officer in Xian, is demoted to work in a community policing center after he accidentally injures a hostage during a rescue mission. At first the new job appears to be simple and straightforward, but Wu and his family gradually get engulfed in a web of mistrust, jealousy, accusations, and even worse things...