Ken在澳门为女儿Rainbow举办婚礼，Rainbow将嫁给他的得意门生Vincent。Ken的两位好友Vic和Mark受邀参加婚礼。婚礼当天，Mark接到Michael Chen的电话，Michael警告他一位神秘大亨雇佣了雇佣兵刺杀Ken。婚礼随即遭到破坏，Ken和Mark被指控侵吞了DOA的非法资金。Ken和Mark再次遭到刺客追杀，Michael及时赶到，并在Ko Chun的侄女Faye的帮助下救了他们。
A bomb explodes during a wedding ceremony and the father of the bride promises to hunt down the mastermind responsible for the attack.
At his daughter's (Tong Fei) wedding, Shi Yijian (Chow Yun-fat) goes insane after being subjected to a "hypnotic therapy" by his brother Xiao Ma (Nick Cheung) and attacked by a robot bomb. The mysterious Yi Tianxing (Jacky Cheung) is determined to kill Shi Yijian, but he is rescued in time by Long Wu (Charles Heung) and his son Long Shiwu (Jacky Heung). "God of Gamblers" Daozai (Andy Lau) and his cousin Gao Fei (Li Yuchun) also come to help Shi Yijian regain his memory. Everyone finally realizes that Yi Tianxing is the mastermind. To uncover the truth, Shi Yijian teams up with "God of Gamblers" (Chow Yun-fat), and a final battle is about to erupt.
