韩战结束之后的汉城，出现了近代四骑士。他们包括拳术教官金义、搏击教练冯侠、爆破专家高英寒及枪械专家利瓦伊诗。而以霍克、雷泰、银花为首的贩毒组织，欲收买退役美国军曹偷运毒品回国，竟将冯侠牵涉其中……This prime example of director/co-writer Chang Cheh's mastery takes place right after the Korean War, as a kung-fu master, combat instructor, explosives expert, and missle specialist heroically represent the Book of Revelation's four riders against murder, corruption, jealous and greed.