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.

　　酒吧保安道格·格拉特（西恩·威廉·斯科特 Seann William Scott 飾）體格強壯，行事略有呆氣，在一次觀看冰球比賽時將不滿觀眾噓聲的球員痛揍，他的壯舉經(jīng)好友拍攝公布后引起大眾注意，陰差陽錯加入當?shù)匾恢П蜿爮念^學起，充當隊中暴徒角色。一場場血戰(zhàn)為道格贏來了知名度，在教練的請托和引薦下，道格進入職業(yè)小聯(lián)盟的刺客隊，刺客隊中有因為受傷而產(chǎn)生心理陰影的昔日王牌球員澤維爾，而道格的任務(wù)，即是保證澤維爾等隊友在場上的安全。道格在比賽之外結(jié)識了熱愛冰球的姑娘伊娃（艾麗森·皮爾 Alison Pill 飾），他向姑娘笨拙的表達著自己的愛慕。另一方面，王牌冰場打手羅斯在前方等待著道格的挑戰(zhàn)……