Royal Air Force combat pilot Kate Sinclair is shot down over a dangerous rebel stronghold in Afghanistan. While fleeing from the Taliban, she comes across an old, sealed bunker where experiments with aliens and humanoid fetuses were apparently conducted. What was once bred as a living weapon of war is now awakening and has only one goal: to kill! Kate manages to escape to a US military base initially. However, when the creatures from the bunker break free and attack the command post, all hell breaks loose...