On the prosperous streets of Central, there was a sudden explosion, and a gang of robbers including Tian Yangsheng (played by Wu Jing) and others robbed a cash escort car carrying $100 million in new banknotes. Many innocent people were killed or injured, one of whom was the fiancée of police officer Chen Jin (played by Nicholas Tse). Chen Jin has since vowed to hunt down Tian Yangsheng to avenge his hatred, but Tian Yangsheng and the $100 million have disappeared. Half a year later, Trainee Inspector Fang Yiwei (played by Shawn Yue) led police officers to intercept vehicles and was attacked. All the team members were seriously injured. It turned out that Tian Yangsheng's gang reappeared. Senior Superintendent Zhang Wenyao (played by Lam Ka Wah) and Luo Peiquan (played by Mark Cheng) jointly planned a chain operation, vowing to arrest a group of gangsters. Patrolman Jinghao (played by Jaycee Chan)'s brother is an undercover who has penetrated into the Tian Yangsheng gang. Due to his identity, he was temporarily suspended and wanted to clear his brother's name. The three were defeated by Tian Yangsheng several times in the pursuit, but they found that the police had a traitor...