20世纪三(sān )四十年代的上海,黑帮(bāng )(🌰)横行,毒品交易猖獗。毒(dú )贩琛哥势力(lì )(🆖)强(qiáng )大,警(jǐng )方(🍖)难(🔬)以获取证据。在一次交易(⏬)中(zhōng ),阿仁和阿(ā )美意(yì )(😎)外重逢,背(🕔)后却(👑)隐藏着鬼哥、(🕖)琛哥与警方三方的算(suàn )计。在重重(chóng )怀疑与考验(🗑)中(😚),阿仁(🙁)做为(🚸)警(jǐng )(🖍)方卧底(dǐ ),深入虎穴,成(chéng )(💞)功(gōng )协助警(jǐng )方缉拿琛哥(gē )与国际毒(⏯)贩。