该片以抗日战争为背景，讲述了杨靖宇将军及抗联战士们为传承革命薪火与日军殊死搏斗，誓死保护“铁血少年队”队员撤离秘营，在极寒环境和残酷战斗的双重打击下，这些英雄们为救下那个仅有13岁的女孩，不畏牺牲奋勇杀敌，最终壮烈牺牲的故事。
ColonelBranson(ThomasGibson),headofasecretandcovertdivisionoftheNSA,keepstheShadowWolvesoperatingalbeitnowindependentandrogue.HisangerafterhisdaughterwaskilledinAfghanistantrainingciviliansdriveshimtodefend"his"Americaandherbordersbyallmeanslegalorotherwise.WhenISISterroristsbegintosneakacrosstheUSBorderintoArizona,BransonalertstheShadowWolvestotrackandstopthem.BransonsendsEricShaw(CodyWalker),hismostdeadlyandeffectiveagent,tojoinupwiththeShadowWolves.TheWolvesareledbyNabahe(GrahamGreene),aNavajohonoredmilitaryveteran,andanoldcolleagueofBranson’s.AtthesametimeinLondonLadyMilton-Simon(LouiseLombard),headofanMI6anti-terroristdivision,sendsouthereliteagent,MajorMcLaren(TomHutch),totrackaterroristnamedKhan(SolomonShiv)whohasapersonalvendettaagainsttheUSandtheShadowWolves.LadyMiltonandMcLarenlearnKhanisheadingtoMexicotobe...