抗美援朝(🌠)战争期(qī )间,志(🐽)愿军某部李(lǐ )军长(李(lǐ )炎 饰)接上级指示,率部(bù )队抵(dǐ )达敌前沿阵地,伺机和友邻部队(🎾)向正(zhèng )面敌人进攻(❣)。到(🏇)达指定(😎)位置(zhì )后(hòu )(⚫),经侦察发(🎩)现,敌前沿三面雷区,只(zhī )有(🥄)正前方有(yǒu )片(🐖)开(🕌)阔(🛺)地(📞),李军长命(😚)令(lìng )副团长崔(🚸)凯((🚑)于纯绵 饰(😱))带一支部队(duì )潜伏(📎)。出发(🔩)前,祖国(guó )慰(🛑)问(wèn )团(tuán )前来(lái )看望前线(🌑)指战(zhàn )员,李军(jun1 )长意(yì )外发现慰问团梅团长(胡(hú )子惠 饰)(⛓)竟(jìng )是老战(zhàn )友的(de )遗(🤷)孀(shuāng ),她(tā )的(de )儿子丁大勇(张良 饰(shì ))就(jiù )在(🐀)将要出(chū )发的潜伏队伍里。李军(💝)长要丁大勇(🍑)留下来陪(🚗)妈妈,但妈(mā )妈坚(jiān )持(🌹)要(⛏)儿(ér )子去(🥋)前线潜伏,并嘱附儿子(💯)狠狠打击(🙎)敌人。潜伏(fú )中,敌人的燃烧(🔤)弹打中了丁大(dà )勇身(shēn )边的荒(🍽)草(🏃),他强忍烧伤巨痛,一(yī )直(zhí )坚持到部(bù )队发(🌸)起总(⏳)攻(gōng )......