主人(🕕)公洪(🌠)三(👷)携(xié )母亲和好(hǎo )友齐(qí )林(lín )到上海(🍩)投奔严华,卷入(rù )两大公司权利斗争(🔧)。严华此(cǐ )时(shí )是一名码头工人,他(💤)不畏强权被推(tuī )举为工人领(🏇)袖。洪三(sān )则凭借机智多(duō )次(🎩)在凶险的(de )上海(hǎi )滩化险为夷。洪三与忠义(🐖)之士沈达(🎿)义(yì )结(🥞)金兰,与来上海(🚸)报(🖍)父(fù )仇的林依依(yī )在(zài )斗智斗(dòu )勇中成为莫逆,女(🥁)扮(bàn )男(nán )装(zhuāng )的林依依爱上洪三。洪三接(jiē )近富家(jiā )女 于梦竹,于(🏂)梦竹(zhú )爱上(🌞)洪三(sān )。严华遇(yù )(💪)险(⛓),为共(gòng )产党(⛏)人梁兴义(🧤)所救,加入共产(chǎn )(💠)党。林依依为报(🕐)仇铤(dìng )而(🚴)走险,洪三与其奔走(🈁)天(tiān )(❕)涯。林依(yī )依遇(🍑)难,洪三重回上(shàng )海滩。在(zài )严华和梁兴(🥋)义进(jìn )步思想(🌼)的感召下(🐩),洪三放弃(🙎)来(💿)之不(bú )(🐡)易(yì )(🈺)的(🤔)“美好生活(huó )”,为护送梁兴义离开上海倾其(qí )所(🔞)有甚至生(🔎)命。洪(hóng )三逐渐懂得(dé )(🔫),共产党带(dài )领的(de )这条道(🍁)路(lù ),才(cái )是他所想追求的远大(👚)前程。