一批為美軍研制秘密武器的科學家神秘失蹤。Tyler領導的海軍陸戰隊員奉命前去查明真相，途中遭遇前所未見的強大敵人，一場大殺戮開始了……OnaremoteUSArmyfacilityagroupofscientistsconductingtopsecretweaponexperimentsvanish.AnelitecovertopsteamcommandedbyLt.Tyler(KevinSorbo)istaskedwithrecoveringthemissingpersonnelwithin24hours.Theunitarrivesonlytofindoutthereobjectivemaynotbewhatitseems,whatwasstrictlyasearchandrescuemissionhasnowbecomesearchanddestroy.WithtimerunningoutandthedeathcountrisingTylersteammustbeginthehuntorfallpreytoapredatorunlikeanytheyhaveeverencountered.
