主人公洪三(sān )携母(mǔ )亲(qīn )和(✒)好(🐽)友(🥇)齐(📼)林(📒)到上海投奔(🌰)严华,卷入两大公(gōng )司权(quán )利(lì )斗争。严(🎹)华此时(🐉)是一名码头工人,他不(bú )畏强权(quán )被(👋)推举(🎲)为工人领袖。洪(😎)三则凭借机(🕔)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结(jié )金(jīn )兰,与来(🙁)上(shàng )海(🚸)报父仇的林依依(yī )在(🐖)斗智斗勇中成(🌙)为莫逆,女扮男装(🚨)的林依依爱(ài )上(shàng )洪三。洪三接近富家女 于(yú )梦竹,于梦竹爱上洪(🙄)三(㊙)。严华遇险,为共(🈴)产党人(rén )梁(🤷)兴义所救,加入共产(chǎn )党。林(🏯)依依(yī )为报仇(chóu )铤而(🚴)走(zǒu )险,洪三与(yǔ )其奔走天(tiān )(❕)涯。林(lín )依依遇难,洪(💍)三重回上海滩。在严华和梁兴(xìng )义(yì )进步思想的感(gǎn )召(📟)下,洪三放弃来之不易的“美好生(shēng )活”,为(wéi )护送(📸)梁(🥤)兴义(yì )离(♌)开上(shàng )海倾其所(🔞)有甚(shèn )(🚲)至(📐)生命(mìng )。洪三逐渐(🆙)懂(dǒng )得(dé ),共产党(🌸)带(dài )领的(🏓)这条道路(🔲),才(cái )是他所(suǒ )(🎦)想追求的远大前(qián )程。