主人(rén )公洪三携(xié )(🔨)母亲和(✒)好友(yǒu )齐(📼)林(📒)到上海投奔严华,卷入两大(🔱)公司(sī )(🤢)权(🤴)利(lì )斗争。严华此时是一(🌰)名(🍖)码(mǎ )(🔬)头工人(rén ),他不畏强权(quán )被(bèi )推举(🎲)为工人领袖。洪三则(🖲)凭借(jiè )机(🕔)智多次在凶(🗄)险的上海(🕯)滩化险为夷。洪(hóng )三与(yǔ )忠义之士沈达义结(jié )金兰,与(yǔ )(✖)来(🙁)上海报(bào )父仇(chóu )(🐶)的林(🕕)依(🤯)依在斗智斗勇(⏺)中(🚢)成为莫逆(🚣),女扮男(nán )装的林依(yī )依(yī )爱上洪三。洪三接(㊗)近富家女 于(yú )梦竹,于梦竹爱上洪三(sān )。严华遇险,为共产党人(rén )梁兴(👃)义(yì )所救(jiù ),加入共产党。林(🏯)依依(yī )为(wéi )报仇铤(🧟)而走险,洪三与其奔走天(❕)涯。林(💔)依依遇难(nán ),洪三(sān )(🚗)重回上海滩。在严华(⛏)和(🐨)梁(liáng )兴(🥋)义进(jìn )步思想的感召(zhào )下(xià )(🐩),洪三放(fàng )弃来之不易的“美好(😙)生活(huó )”,为护送梁兴义离开上(shàng )海(hǎi )倾其所有(yǒu )甚(shèn )至(📐)生命。洪三逐渐懂得,共产党(dǎng )(🌸)带(dài )领(⏳)的这条道路,才(cái )(🕕)是他(tā )所想追求的远大前程。