主人公洪三携母亲和(📼)好友齐林(lín )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(mǎ )头工人,他不畏强权被推(tuī )(❣)举为(wéi )工人(rén )领袖。洪(⚫)三则(zé )(🕔)凭借机智多次在凶险的(👁)上(🙍)海滩化(🔲)险为夷。洪(hóng )三(🐖)与忠义(📞)之(zhī )(🎿)士(shì )沈(🥞)达义结金兰,与来(lái )上(shàng )海报(bào )父(🕕)仇的(de )林依依在斗智(🚢)斗(🌙)勇(yǒng )中成为莫(mò )逆,女(🚨)扮男装(😞)的林依依爱上洪三。洪(🥎)三接近富家(📙)女于梦(mèng )(🐑)竹,于(yú )梦竹爱(🙄)上洪三。严华遇险,为(wéi )(🍄)共产党人梁兴(xìng )义所救,加入(💠)共产党(dǎng )(🏯)。林依依(yī )为报仇铤(🧣)而走险,洪(👣)三与其奔走天(tiān )(💹)涯。林依依遇难(💍),洪三重(chóng )回(huí )(🈸)上海滩。在严华和梁兴(🃏)义进步思(🚶)想的感召下(xià ),洪(hóng )(🏒)三放(fàng )弃来(lái )之不易的“美好(hǎo )(⏲)生(shēng )活”,为护送梁兴义(yì )离开上(shàng )海倾其所有(yǒu )甚(shèn )至生命(mìng )。洪三逐渐懂得,共产党(dǎng )带领(lǐng )的这(zhè )条道(👛)路(🕕),才(👗)是他所想追(🔪)求(🐂)的远大前程。