一批为美军研制隐秘武器的科学家奇妙失踪。Tyler领导的海军陆战队员奉命前去查明真相，途中遭遇前所未见的强大敌人，一场大杀戮开始了……OnaremoteUSArmyfacilityagroupofscientistsconductingtopsecretweaponexperimentsvanish.AnelitecovertopsteamcommandedbyLt.Tyler(KevinSorbo)istaskedwithrecoveringthemissingpersonnelwithin24hours.Theunitarrivesonlytofindoutthereobjectivemaynotbewhatitseems,whatwasstrictlyasearchandrescuemissionhasnowbecomesearchanddestroy.WithtimerunningoutandthedeathcountrisingTylersteammustbeginthehuntorfallpreytoapredatorunlikeanytheyhaveeverencountered.