On her ?nal combat mission across the rugged mountains of Afghanistan , Royal Air Force ?ghter pilot Lt . Kate Sinclair’s jet is shot down over one of the most dangerous rebel strongholds . When insurgents come after her at the crash site, she ?nds refuge in a long since abandoned underground bunker. After tracking Sinclair into the depths of the bunker, the insurgents accidentally awaken a man-made deadly biological weapon known as the Ravagers - half human, half alien and hungry for human ?esh. Terri?ed, she watches the creatures rip apart the men pursuing her. Sinclair barely escapes and is picked up by a US army patrol sent to ?nd her. Major Roy Finch, commander of the local US army outpost ‘Fort Apache’, and his ragtag squad of brave soldiers have a dif?cult time believing mutant monsters have been kept hidden in these mountains . Unaware that she has been tracked to their base, dozens of the vicious creatures are already swarming towards them.