Follows a land surveyor on an assignment to measure an ancient forest for a developer but soon loses his reason in a supernatural environment that has its own plans.

地球被外星机器人入侵，人类变得稀少和贫困。在偏远的乡村，饥饿的人们如同盘旋在天空中的外星人一样危险。一个精力充沛的19岁女孩Sarah Connolly（达科塔·布鲁·理查兹 饰）开始拼命反击一群饥饿的土匪，她保卫着她父母的农场、剩余的牲畜、和太阳能电池板……如果她不成功，她将失去唯一的食物与住所。