Fight the gang. According to the brief introduction of the TV series "Decisive Gang", in this drama, five policemen went deep into the gang to do undercover work in order to maintain social order and public safety. "Decisive Battle of Gangsters" is a TV series that reflects China's public security organs' crackdown on organized crimes of underworld nature. The play is adapted from some real cases in the national special struggle to crack down on evil, and tells the story that Song, the leader of the investigation team to crack down on evil, led the team members to investigate a forced demolition case in depth, broke through the layers of obstruction, fought fiercely with the evil forces behind the scenes, and brought the criminals to justice.