1947年,山东潍河岸边。武工队长马汉东(赵滋(zī )民 饰)在河东阻击战中负重(chóng )伤(🛤),他令(lìng )通(tōng )讯员小(🥩)陈(孙羽(yǔ ) 饰)回河西司(sī )令部(♑)送信:(🚤)陈(🖲)兴(侯健(jiàn )夫 饰)已投敌,请上级派人到(dào )(🥄)河(hé )东整(🏐)顿队伍、纯洁组织。小陈奉命(🙁)泅回河(hé )西,刚上岸碰上(shàng )叛徒陈兴(xìng )(⏺),战斗中(zhōng )陈兴被(🥁)小陈击(🚨)伤。受(😞)伤的陈兴带(dài )还乡(🎛)团抓走了小陈(chén )(🗞)的父母及弟弟(🏂),严刑拷打(dǎ ),仍得不到小陈的下落,只好(hǎo )(🤷)释(👃)放小(xiǎo )陈的父亲以引诱小(xiǎo )陈上钩。司令(🐀)部派(🚴)姚队长(zhǎng )((🕯)张凤(👣)翔 饰)(❕)和杨副(fù )(💔)队长((🍑)刘振中 饰)跟小陈去(🏻)河东。,但走到(dào )河(🃏)边(biān )发(💅)现(xiàn )船(chuán )(🚶)已被风吹走,小陈(🙎)只好(🎥)找来(lái )父亲(📧)帮(🔍)忙,此(cǐ )时敌人已(yǐ )发觉我方(fāng )渡河意图。黎明时(🏴)分,一场(🌂)战(zhàn )斗(🌱)在(👄)潍河边打(dǎ )响了......