警方围剿毒枭组织过程中，缉毒警察暗中打入毒枭内部展开反毒行动。当第一代大毒枭死于与警方的枪战中后，名为院长的第二代大毒枭（曾志伟 饰）悄然崛起。急于打开局面的毒枭院长，盯上了第三代毒品。于是，安排手下小弟（陈龙 饰）作为卧底潜伏在制毒天才华哥（吕良伟 饰）身边。当被称为天才毒师的华哥制造出纯度惊人的超级毒品时，两大贩毒集团之间的博弈正式拉开帷幕，正邪两股势力，警察、毒枭、黑帮三方对决，将会掀起一场别开生面的反毒之战！

　　Poor, hungry peasant Macario longs for just one good meal on the Day of the Dead. After his wife cooks a turkey for him, he meets three apparitions, the Devil, God, and Death. Each asks him to share his turkey, but he refuses all except Death. In return, Death gives him a bottle of water which will heal any illness. Soon, Macario is more wealthy than the village doctor, which draws the attention of the feared Inquisition.

　　巴斯卡是广告公司的创意人员、迪第耶是百货公司警卫、具贺拿则是市场的小贩、三个不同背景的人原本不认识，某日却发现三人原本是同父异母兄弟，更惊讶的是，母亲为他们留下三百万法郎遗产，一连串荒诞曲折的疯狂故事，就此展开。