西门吹雪（何润东饰）和叶孤城（严宽饰）约定于九月的月圆之夜决战紫禁之巅。消息刚刚传出，就发生了一系列匪夷所思的杀人案件。陆小凤（张智霖饰）还没来得及摸清头绪，红颜知己欧阳情（贺丹丹饰）也遭逢暗算。为查明真相，陆小凤一路明察暗访，他预感到“紫禁之战”的背后一定暗藏玄机。当谜底被一一揭开时，原来这些江湖风波都是叶孤城所设计的野心勃勃的复仇计划。 　　本部古装数字电影根据古龙的武侠小说《陆小凤传奇》中的单元《决战前后》改编而成，由香港著名导演邓衍成执导，张智霖、何润东、严宽等主演。邓衍成号称“香港罪案题材电影”第一导，此次执导本片，更是把武侠大师古龙先生小说中最奇幻悬疑、最快意恩仇、最动人心弦的《陆小凤传奇》呈现于荧屏，广受武侠迷们的称赞与喜爱。

July 1937. The Chinese people are suffering under the hands of advancing Japanese troops, bent on the intimidation of civilians, destruction of property and widespread panic. To combat this threat a small regiment is sent to investigate the Japanese forces and discover a huge warehouse full of supplies. Choosing to strike while the iron is hot they undertake a dangerous solo mission. But will this night raid break them or make them?