主人公洪(hóng )三携母亲(🥇)和好(📒)友齐(qí )林(🍩)到上(🌰)海投奔严华(🕸),卷(🔱)入两(🤢)大公司(sī )(🎺)权利斗争(🆖)。严(🐉)华(huá )此时是(🔬)一名(🗼)码头(tóu )(🥩)工人(rén ),他(tā )不畏强(qiáng )权被(bèi )推(❣)举(jǔ )为(🏇)工人领(lǐng )袖(xiù )(🚤)。洪三(🐿)则凭(🔸)借(jiè )机智多次在凶险的上海(hǎi )滩(✳)化(🔲)险(🥄)为夷。洪三(🐖)与忠义之士沈达义结(jié )金兰,与(yǔ )(🚸)来上海报父仇的林依依在(zài )斗智斗勇(📎)中(🧚)成为莫逆(nì ),女扮男(nán )装的林依依爱上洪三。洪三接(💻)近富家(jiā )女于(yú )梦竹,于梦竹(zhú )爱上(shàng )洪三。严(yán )华遇险,为共产党(🤷)人梁(liáng )兴义(yì )所救,加入共(👺)产党。林依依为报仇铤(🧣)而走险,洪(👣)三(🗳)与其(🈁)奔走(zǒu )天(💹)涯(yá )。林依(yī )依遇难,洪(hóng )三重(chóng )回(huí )(🈸)上海滩。在严华(huá )和(hé )(🥋)梁兴(xìng )义(yì )进步思想(💹)的感召下,洪三放弃(qì )(🎥)来(lái )之不易的“美好生活”,为护送梁兴义离开上海倾其所有甚至(🌂)生命。洪三逐渐懂得,共产党带(dài )领的这条道(dào )路,才是他所想追(zhuī )求的远大前程(🧘)。