越南海关军官阮文泰常滥用职权压榨平民。曹芹南、通伯、家洛、阿斗、水仙和百合在越南时屡被阮欺压，立意偷渡来港，却于公海遭阮派人洗劫，女的更被强奸，曹妻因而折磨至死。曹等人几经辛苦，漂流抵港，在港经营餐厅生意。国际刑警查知阮以渡假为名，来港与黑道人物陆逢春勾结，把庞大军火运往荷兰，遂派女刑警歌狄亚联合国驻港国际刑警雅伦搜集阮之罪证。百合与水仙在夜总会中得罪陆之手下，曹等人出面摆平，与陆结怨。阮来港后得悉曹等人在此，恐他们坏其勾当，买凶杀他们。曹等人脱险后与歌狄亚联络，合力对抗阮，歌以美色诱阮，探得军火收藏地后通知曹把军火劫走。曹以军火逼阮交易，暗中在废屋四周布下死亡陷阱，连场大战瞬即展开......

An alternative cut of the movie "The Sad Story of Saigon". A boatload of smugglers are slaughtered by machinegun fire by a bunch of baddies, led by the villain Yuen Wan Tai. A group of Vietnamese refugees living in HK vow revenge on Yuen, who caused each of them harm.