A young nurse called Ana arrives at a small village where she is supposed to take care of a woman in a coma, Sara. Her husband, Augustin, picks her up and takes her to the mansion where Sara is, while...
莎拉（伊丽莎白·奥尔森 Elizabeth Olsen 饰）和父亲来到了空置已久的湖边小屋，因为这里即将被出售给他人，所以父女两人决定先过来把卫生给打扫打扫，也算是一种告别的仪式。时间一分一秒的流逝着，夜幕渐渐降临，黑暗和静谧笼罩着湖面，亦覆盖了小屋。 一声异响之后，萨拉呼唤父亲的名字，却得不到回应，她搜寻整个小屋，却发现父亲竟然从这件屋子里凭空消失了。夜越来越深，恐惧慢慢充斥了萨拉脆弱的心...