主(zhǔ )人公洪三携母亲和好友(yǒu )齐林到上海投(tóu )奔严华,卷入两大公(gōng )司权利斗争(🔧)。严(yán )华此时(shí )是一(yī )名码头工(gōng )人,他(💤)不畏(wèi )强(qiáng )(📿)权被推举为工人领袖。洪三则凭借机智(zhì )多(duō )次在凶险(xiǎn )的上(shàng )海(🕯)滩(tān )(👁)化险为夷(🔲)。洪三与忠义之士沈(📞)达义结(🥞)金兰,与(✖)来上海(hǎi )报父仇的(de )林依依在斗(dòu )智斗(💞)勇中成为莫(mò )逆,女(nǚ )扮男装(zhuāng )的林依(yī )(😞)依爱(🔢)上洪三。洪(🎛)三(sān )(🌊)接(㊗)近(🥎)富家(💻)女 于梦竹,于梦竹(zhú )爱(ài )上(🌞)洪三。严(🙀)华(huá )遇险,为共产党人(🥫)梁兴(xìng )义所(🔔)救,加入共产党。林依依(🎋)为报仇铤而(ér )走险,洪三与其奔走天(tiān )涯。林依(🏉)依遇难,洪三重回上海滩。在(zài )严华和梁兴(xìng )义(🤷)进步思想(xiǎng )的(🚶)感召(📟)下,洪(hóng )三放(fàng )弃来(lái )之不(🐡)易的“美(měi )好生活”,为护(💏)送梁(liáng )(🥤)兴义离开(💸)上(🥅)海(hǎi )(🐞)倾其所有甚至生命。洪三逐渐懂得(dé ),共产党(dǎng )(🌸)带(dài )领的(🏓)这(zhè )条(🎐)道路,才(cái )是他(tā )所想(📤)追求(🍺)的(🔪)远(yuǎn )大前(qián )程(chéng )(⏺)。