四位大学同窗好友，相约周末一起到废弃矿坑探险，欢天喜地出游，不料却演变成一场致命的生存游戏。遭受攻击的他们，先是丧失对外求援的通信设备，又被一群聪明又残暴的狼群团团围住，被迫受困在人称「鬼镇」的废弃矿坑里，他们既饿又累，一个不小心，简单的一句话就容易擦枪走火，引爆朋友间失和与猜忌，面对这腹背受敌又进退两狼的情况，想要活命就得突破狼围，究竟他们是否能携手合作，展开这场谍对谍的人狼斗智…

Charming LA architect Harrison, also a great cook and lover, gets engaged to Cate, a San Francisco landscape architect he meets while collaborating on a major project, after they get locked in by a malfunctioning elevator. She moves to LA for him and volunteers, while he's on mission in Tokyo, to mind his widowed mother Evelyn, still a major force in his life. However Cate gets paranoid when feeling weak and hearing rumors that his former girlfriend disappeared mysteriously years earlier, even cancels the engagement. Then the truth gets out, clearing Harrison and uncovering a lurking danger.