主人(🕕)公洪三携母亲(qīn )和好友(yǒu )齐林到上(shàng )海投奔严华,卷入(rù )两(liǎng )大公(🕰)司权利斗(dòu )争。严华(huá )此(🥈)时是(🛤)一名码(🔬)头(🏴)工人,他不畏(🎾)强权被推举为工人领袖。洪三(🚤)则凭(píng )借机智(zhì )(🔸)多(duō )次在(zài )凶险(🛍)的(🎡)上(🕖)海滩化险为夷。洪三(🚉)与忠(zhōng )义之士沈达义结金兰,与来上海(hǎi )报父仇的林依(🤯)依在斗智斗勇(yǒng )中成为莫逆,女(🥁)扮男(📯)装的林(⏯)依依爱上(❔)洪(hóng )三。洪(🎛)三接近(🥎)富家(jiā )女 于梦(mèng )(🔝)竹,于(yú )(🏂)梦竹爱上洪(hóng )三(sān )。严华遇(💪)险,为共产党人梁兴义(🧤)所(🔔)救,加(🕙)入(rù )共产党(dǎng )。林(🏯)依依(yī )(🎋)为(wéi )报仇铤(dìng )而(ér )走险,洪三与其奔走(zǒu )天涯。林依依遇(🍑)难,洪(hóng )三(🚗)重回上(😊)海滩。在严华和梁兴义进(jìn )步思想的感(gǎn )召下,洪三放弃来之不(bú )易(yì )的“美好生(🤥)活”,为护送梁兴义离开(kāi )(💸)上海倾其(qí )所有甚(shèn )至生(shēng )命。洪(hóng )三(👄)逐渐懂得,共(gòng )产党带领的这(zhè )条道路,才是他所想(📤)追求(🍺)的(🔪)远大(👚)前(🛃)程。