A series of gangster bosses were kidnapped, extorted and killed, and the police had no clue about the investigation. Zhang Bowen (Simon Yam), the captain of the police team B, had made great contributions to the police force, but after his wife was killed in revenge by the gang, and the captain of the team A excluded him, he began to be passive. The police received a report that another gang leader was kidnapped, and the new Chief Superintendent Gu Guoqiang (Fala Chen) summoned two teams to conduct a comprehensive investigation of the case. Because the captain of team A underestimated the enemy, and the criminals were highly skilled and cooperated closely, the police suffered a heavy blow in an operation. At this time, at the request of Superintendent Gu, Zhang Bowen led his only two detectives to secretly investigate the case. After careful investigation, Zhang Bowen targeted the leader of the criminals as He Zhansen (Michael Miu), who was once a police inspector. His men included many former members of the Flying Tigers, and the real purpose of He Zhansen kidnapping the gang boss was to avenge his brother who was killed by the gang in revenge...