在这部最后一次驱魔2惊悚/恐怖片中,精神病院一场惨烈的大火，令无数人丧生祸害，妮儿·史威特（阿什丽·贝尔 Ashley Bell 饰）作为唯一的幸存者活存于世。这一日，没有任何知觉的妮儿突然醒来，她已经忘记前几个月发生的事情，只依稀残留对恶魔的恐怖记忆。弗兰克·默勒（缪斯·沃森 Muse Watson 饰）将其带回自己开办的创伤少女关怀机构，希望通过科学的方法帮助妮儿远离邪教的影响，找回健康、正常的人生。在弗兰克的帮助下，妮儿尝试相信所谓的超自然都只不过是幻想而已，她在此与美丽女孩格温（朱莉娅·加纳 Julia Garner 饰）结为好友，也与名叫克里斯的男孩（Spencer Treat Clark 饰）互生好感。
然而恶魔并未忘记它唾手可得的猎物，身处阳光下的渐渐被彻骨寒冷的恐怖阴影所覆盖……
Seventeen year-old Nell Margaret Sweetzer is found completely insane when trying to explain her possession by the demon called Abalam. After medical and psychological treatment, she is sent to the Deveraux transition house in New Orleans managed by Frank Merle, who helps her to start a new life. She finds a job as a hotel housekeeper, befriends her new roommates, and develops a crush on her coworker, Chris. Soon, Nell comes to realize that she is haunted by people from her cult... and by the same evil force that once possessed her. When Nell meets Miss Cecile, she tells Nell that she has been following her since the hospital. Further, she discloses that she belongs to the sect Order of The Right Hand, and that they can protect her from the evil in an attempt to divert the prophecy of an apocalypse. Will Nell accept help, and be protected from the extremely powerful, evil force Abalam -- Or will she come to accept... herself?
比“真坏”更糟糕的是“伪善”。It's Ruined。。高潮未到，提裤走人。如果你相信上帝，你必须相信恶魔。期望越大，这失望当然越大…。期望越大，这失望当然越大…。
