在高中担任教师的乔什·莱姆波特(帕特里克·威尔森 Patrick Wilson 饰)和身为自由音乐人的妻子兰娜(罗丝·拜恩 Rose Byrne 饰)拥有一个幸福的五口之家。然而自他们乔迁新居之后,恐慌和不安便尾随而至。尚在襁褓中的女儿凯莉经常莫名大哭,次子福斯特(Andrew Astor 饰)对卧室充满恐惧,而长子达尔顿(Ty Simpkins 饰)更在一次惊吓过后陷入长久的昏迷之中。在此之后,各种奇怪恐怖的事件接连发生。莱姆波特夫妇不胜其扰,精神几近崩溃,他们最终决定搬离这个不祥之地。 但是一切并未就此结束,侵扰他们的魔鬼似乎尾随莱姆波特一家来至新的住所,更扬言要占据达尔顿的身体……A gripping story of a family in search of help for their son, Dalton, who fell into a coma after a mysterious incident in the attic. Little do they know that there is much more to this endless sleep than meets the eye as they explore the paranormal, and rediscover the past; the key to getting their son back once and for all.