主人公洪三携(🔨)母(🆓)亲(qīn )和好友(yǒu )(🥇)齐(qí )林到上海投(🔼)奔严华,卷(🕟)入两大公(gōng )司权利斗争。严华此(cǐ )时是一名(🍖)码头工人(rén ),他不畏强权被(👋)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。洪三(sān )与(yǔ )忠义(yì )之士沈达义结金(🗑)兰(😚),与来上(shàng )海报父(fù )仇的林(lín )依依在斗智(zhì )斗勇(⏺)中(zhōng )成(chéng )(🌙)为(wéi )莫逆,女扮男装的林(lín )(⏯)依依爱上洪三。洪三接近(jìn )富家女(🗞) 于(yú )梦竹,于(🏂)梦竹爱(ài )上(shàng )(🌞)洪三。严华(🙉)遇(yù )险,为(wéi )共(gòng )(🈴)产(chǎn )党人梁兴义所救(jiù ),加入共产党。林依依为报仇铤而走(🧣)险,洪三与其(🗳)奔走天涯。林依依遇(yù )(🍑)难(nán ),洪三重(chóng )回上(😊)海(🈸)滩。在(zài )严华和梁兴义进步思想的感(gǎn )召下,洪三放(🏒)弃(qì )来之不(🐡)易的“美好(😙)生(shēng )活(huó )”,为护送梁兴(🔷)义离开(kāi )上(🥅)海倾(qīng )其(qí )所(🔞)有(🏴)甚至生(🔎)命。洪三逐(🐖)渐懂得,共产(chǎn )党带领的这条道(dào )(🍁)路(lù ),才是他所想追(zhuī )求(🍺)的(🔪)远大前程。