影片为《东北警察故事》前传,讲述一名嫉恶如仇的刚正东北小警察李红旗(谢苗 饰)在一次相亲中,意外发现当地涉黄恶霸的存在,随着调查深入,一个以毒品控制及压迫女性的地头蛇恶霸团伙浮出水面,还公然挑衅警察,而且他不曾想到自己最好的兄弟也牵扯其中……面对一个个无辜受害的女性,一群禽兽不如的罪犯,李红旗决定死磕到底,势必铲除这颗“黄色毒瘤”。The film is a prequel to Dong Bei jing cha gu shi (2021), which tells the story of a righteous Northeast police officer named Li Hongqi who is jealous of evil as enemies. During a blind date, he accidentally discovers the existence of local bullies involved in pornography. As the investigation deepens, a gang of local tyrants who control and oppress women with drugs emerges and openly provokes the police. He never imagined that his best brother was also involved... Faced with innocent victims of women, A group of criminals who are inferior to beasts, Li Hongqi has decided to fight to the end, and is bound to eradicate this \"pornography tumor\".