Chao discovers that he is suffering from cancer and has only a few months to live. Wanting to alleviate his girlfriend Su-An's financial burdens, Chao starts working as a muscleman for a mob boss and successfully expels the competing gang from the area. With nothing left to lose, he becomes unstoppable.

凌霄及关望龙同为天鹰镖局之镖师，二人武功卓绝，善于应变，起镖之后，常能坚守人有一口气，镖旗不落地之信条，使劫匪无计得逞，因此深得镖局主人的器重。关望龙单恋主人孙女方燕，渴望赢得芳心，日后继承镖局，但方燕一缕情丝系于凌霄身上。关望龙迁怒凌霄，心中怀恨，竟与黑道中人金不换密谋劫镖，嫁祸凌霄。