依据韩战时期真实战事改编。1950年6月25日，北韩挥军越过三八线突袭南你最重要的那团体突然就消逝在你的世界里，那种觉得一定比心被掏空了还要舒服。，三日攻陷汉城（今首尔），阵线不时南进。在美军及结合国军援助下，南韩军逆势还击。美军指挥官麦克亚瑟提出代号为「铁铬举动」的仁川登陆方案，该方案急需一支大队的兵力从侧翼阻击扰敌、声东击西，经过长沙里切断北韩军的补给线。由于义务自身极端艰钜，加上南韩国军事先兵力单薄，无法抽调足够正轨军援助，军方不得不把这项义务交付给772名先生兵执行，这些先生兵平均年龄只要17岁，仅仅接受了两星期的军事训练，在毫无实战阅历的状况下投身战场。行军路上固然杀机重重，战友外部也诸多衝突，年少气盛，迸收回各种角力。仁川登陆战前夕，长沙里登陆义务如期执行，这群徒有一腔热血但战力单薄的先生们，无可防止地接授命运中最严酷的考验：穿越炮火与海浪，浴血长滩，馀下部队身陷敌军重重围歼，直至弹尽粮绝，挣扎于阵亡与倖存的分界限上…BasedontheincredibletruestoryofJangsariLandingOperation.WhenNorthKoreainvadesSouthKoreaonJune25,1950,theypushedSouthKoreaanditsallyUSArmytothesouthernmostcity.U.S.GeneralMacArthurplannedOperationChromite,whichwouldseethejointalliedforcestotakebackastrategiclocationofInchonandinorderforittosucceed,heneededasmallbattaliontoflanktheNorthKoreanarmyandeliminatetheirsupplylineatJangsaribeach.HavinglosthisfamilyonhisretreatawayfromNorthKoreabeforetheWar,amodelstudentChoiSung-pilenlistsinthearmytofightfortheSouth.KiHa-ryunisarebelliousyouthfromtheSouthwhovolunteerstofightinthewar.Allofthe772studentsandyouthsarelikethemwhoarebarelyoutofschoolwithonly2weeksofbootcamptraining.TaskforcecommanderCaptainLeeMyung-junknowsthatit’salongshot,buthehasnochoicebuttoleadthemintoacrucialmission.Meanwhile,USwarcorrespondentMaggiebravesthedangersofthebattlefieldtoreportonthewarinthefrontlines.ShefeelsempathyfortheKoreanstudentswhomustgointobattleonbehalfoftheveteransoldiersfortheircountry,andtriestodowhatshecanonherendtorescuethem.Withlittleammo,scantfoodsuppliesandraggedyweapons,canthestudentssuccessfullycarryouttheirmissionandreturnhomesafely?
