A Special Agent is assigned to protect a wealthy business magnate. However, when the businessman is kidnapped in a daring ambush, he teams up with a seasoned detective to crack the case. But soon he discovers the case isn't that simple....

As the Chinese Civil War broke out, Ting Kwan-pik and his comrades Cheung Cho-fan, Lau Fuk-kwong, and captain Zeng Chaozheng were captured by warlord Duan Qirui’s men. In the chaos, Lau denoted a hand grenade, and they managed to escape. After the war, Ting returns home to his wife Cho Chiu and daughter Sze-sze. One year later, Ting becomes a policeman. During a drug raid, Ting kills Haye’s uncle. In the funeral, Haye’s henchmen are furious and vow to avenge Haye’s uncle by killing Ting. As a serious gunfight break out, Ting’s fellow policemen come to help. The fight takes a heavy toll of lives on both sides....