A police sniper teams up with a hot-headed rookie to take down his former friend and teammate, who is exacting revenge on the police force.

After suffering life changing injuries in the line of duty, bomb disposal officer Fung turns his back on the police. But when a devastating series of bombings sweep Hong Kong, the police suspect their former ally may be involved after he is found unconscious at a crime scene. Now faced with memory loss and recalling only fragments of his former life, Fung sets out to uncover the truth and find out who he really is.

On the night before his wedding, Joe receives a phone call stating that his fiancée, Shirley, has been kidnapped. In order to save her, he must abduct four people before it is too late.