1930年代(dài )(🔨),小云、小红(📼)(周璇(xuán ))姐妹被人骗(piàn )(😘)到上海(hǎi )卖给琴师和妓(jì )(🎺)院老(🎗)鸨(🎹)夫妇,小云(yún )(🌰)被迫(🔬)做了暗娼,小红(hóng )年纪(jì )(🌫)尚小(⏬),又(yòu )天生有(yǒu )(🏇)一副好嗓子,便(biàn )随琴师(shī )去茶(🤷)楼终(🛍)日卖唱。姐(jiě )妹两人住(zhù )在(🛹)贫(🚉)民窟(🚥),在她(tā )们对面,住的分别是报贩老(🖍)王和吹鼓手(shǒu )陈(😱)少平(赵丹)。因(yīn )为闲来无事时陈(🚨)少平常同小红(hóng )对窗玩闹,两人(rén )渐生感情。