韩国特务白民为了追查盗取国家军情的间谍来港，岂料，两名间谍先后被杀，情报则不知所踪。民凭着间谍临终遗下的线索，寻找军火商人沙劳特。民欲透过交游广阔的舞女香兰找沙劳特；兰原为敌方特工，却对民动了真情。另一方面，民和接应他的特工马利亚联络上，二人过从甚密。兰看在眼里，醋意大发，加上主事人虎林施压，兰施计引民、马利亚到夜总会，弄得二人身陷重围。可是，兰不忍民受害，牺牲性命，助民脱身。民遂施尽浑身解数，及时救出马利亚，并成功夺回情报。

Musician Sun Ping is estranged from his wife. Second daughter Yinzheng lives with Sun while eldest daughter Jinliu follows her mother. By coincidence, the sisters both enter the 'Calendar Girl' pageant but Jinliu deliberately lets her sister win the contest. Later, the sisters and Liu Bucheng perform in Sun's musical show. Though the show is a success, Yinzheng decides to quit in order to get married. Not wishing to disappoint their father, Jinliu devises a plan to make Yinzheng stay on, but the plan misfires. Yinzheng leaves angrily. She is at last brought back to the show due to Liu's mediation. The elders also reconcile as the sisters perform together on stage.