純潔的工廠女工楚玲（陳萍）寄人籬下，不幸遭五漢輪姦後，染上性病。因求助無門，楚玲索性投身酒吧陪客，試圖在燈紅酒綠之中找出曾向她施暴的色狼。酒吧老闆（羅烈）悉楚玲遭遇後，答應教她功夫，楚玲歷盡艱辛，終於找到昔日五個將她姦污的歹徒。色字頭上一把刀，歹徒逐一被殺……。

One night a textile worker is sexually assaulted by five deviants. The young lady tries to cope with the aftermath of this dramatic event but her life is ruined. Like a shattered vase, the pieces can be put back together but it'll never be the same. Cheng get's a job as a bar girl. She meets the club's owner who was a former kung-fu fighter until he was crippled. Cheng uses her position as a B-girl to go after the losers who raped her, She soon learns from a sleazy doctor that she has contracted a dark V.D. called Viet-Nam Rose. Crushed, she begs Lo Lieh to teach her kung-fu. At first he refuses until he learns her secret. Furious, Lo Lieh teaches her his deadly fight techniques (such as a groin crunching blow).

Un soir, en rentrant chez elle, Ling, une ouvrière dans une usine de textile, est victime d'un horrible viol. D'abord traumatisée et meurtrie, elle rencontre ensuite un patron de bar infirme.

À ses côtés, elle va reprendre confiance en elle et s'initier au kung-fu dans le but d'accomplir sa vengeance.