An ordinary police officer "Xuan Shen" was attacked by gangsters in 2018, which resulted in the death of his godfather, the police chief, and the rebellion with his best brother. Five years later, he became the captain of the mobile team and met the gangsters again. He was involved in the latter's revenge against the two major gangs. "Xuan Shen" also found that his former brother seemed to be falling into the vortex of crime, and the police-gangster showdown began.