A tale between two brothers. One has left the triads and gone legit. The other has decided to stay and keep the triad from going to the ways of drugs and gun running. But, when one brother's in trouble, will the other drop whatever he's doing and protect his sibling even if it means losing his life? 献给通化市军分区录像厅和抚松县文化馆。兄弟情。王家卫的黑帮片，有点不一样。香港黑帮电影的俗套。所谓的换位思考。男人的戏，怪之又怪。走好吧，老大们。。影坛称得上大哥的怕只有邓光荣。一世人，两兄弟。曾经有一种电影叫枪战片。 阿伦（邓光荣 饰）和阿天（周润发 饰）自小在澳门街头流浪长大，两人相依为命，情比兄弟，立志要闯出一番天地。就在二人终于出人头地，风生水起的时候，阿伦却因杀了黑帮老大高老四（谢贤 饰）的手下而在泰国遭到追杀。与此同时，阿天在儿时经常玩耍的修女院旧址，遇到了童年的玩伴卡希（夏文汐 饰），两人互生爱慕，订下终身。卡希希望阿天在结婚后转做正行，二人一起离开澳门，去香港生活。就在阿天准备和阿伦告别之时，高老四对阿伦的追杀愈演愈烈。大难当前，兄弟二人最终又会何去何从……
