In the early 21st century, Zhu Jianguo, the combat commander of the Wolf Soul Squadron from the Special Forces Brigade of the Western Military Region, almost collapsed because he sacrificed two team members in a mission. He then applied for transfer and returned to his hometown police station to work as a policeman. Liu Ziyan, one of the hostages who met Liu Ziyan during the last mission of the army, also accidentally entered the public security system. The intersections between the two, and Zhu Jianguo's road to cracking down on crime and anti-corruption in his police career led the entire society to live a more perfect and happy life.