Like many 9-year-old boys, Eli Braverman believes something menacing lives in his basement. When his older sister leaves him home alone one night, Eli discovers if this evil is real or all in his head. What Eli confronts may end up being far more terrifying than even his worst nightmare.
平凡的一天，名叫扎克利和伊森的小男孩在某公园内发生争执，前者用棍子将后者的嘴打破。这起不大不小的儿童纠纷，将两对本没有任何交集的夫妇拉到了一起。经营小百货商店的麦克·朗斯特里特（约翰·C·赖利 John C Reilly 饰）与身为作家的潘妮洛普（朱迪·福斯特 Jodie Foster 饰）是伊森的父母，他们在家中迎来扎克利的父母——律师艾伦·考温（克里斯托弗·沃尔兹 Christoph Waltz 饰）以及投资经纪人南希（凯特·温斯莱特 KateWinslet 饰）——的拜访。他们就孩子的伤害事件协商、
