The nightmare was about a demonic possession. A long time ago, there was an evil in a small town and it was jealous of the girl and would never let her go, since the devil loved the girl. One night, the evil raped the girl and she became pregnant. After months the girl could not hide her baby, her father figured her secret out and clapped the girl in irons and locked her room door. But the evil put the gun to her father' temple and saved the girl. The father had a stroke and had been sleeping on the bed for three months and died. Time went on and the girl brought a child into the world. Naturally, people who were living in the village heard the story and they did not want to see neither the girl nor the baby since when the baby was born, plants dried in the field, fishes lost in the lake and people had prayed to the god for rain, but nothing changed in the village. People got so angry, dug a hole in front of the fountain, put her into the hole and threw stones at her face. The girl died soon after. The evil went off the deep end, took a revenge of the village and killed everyone except two sisters because the evil wanted them to take care of its baby...

　　Two sisters living separate lives on different continents are reunited on a Mediterranean Island. The two barely have time to bond and revive family ties as Kate, the elder, meets a group of locals and agrees to an exciting ride on a hot air balloon. But disaster strikes and as the result of a freak accident, the balloon is carried far out to sea. Their cell phones out of range, and the balloon running out of gas, Kate and her friends are battling for their lives. While, back on land, the younger sister, Liz, has become an unwanted "material witness" to a crime. Matters then take a dramatic twist, one that will mark their lives forever.

　　該片故事講述一名變態殺手（克里斯托弗·阿波特 飾）計劃在酒店招妓（米婭·華希科沃斯卡 飾），并將其謀殺。然而他計劃卻失敗了。

 故事發生在1966年6月6日的上午6時，在這樣一個不吉利的時刻，美國大使羅伯特（格利高里·派克 Gregory Peck 飾）領養了一個男孩并取名戴米（哈維·史蒂芬斯 Harvey Stephens 飾）。隨著時間的推移，戴米漸漸長大，一些奇怪事件的接連發生預示著厄運敲響了羅伯特的家門。戴米的保姆莫名自殺后，一個神秘的女人貝洛克（比莉·懷特勞 Billie Whitelaw 飾）毛遂自薦留在了戴米的身邊。之后，神父博南（帕特里克·斯偌頓 Patrick Troughton 飾）找到了羅伯特，他告訴羅伯特，戴米是撒旦的孩子，戴米會不擇手段完成統治世界的野心。對于神父的話，羅伯特半信半疑，直到博南神父的死訊傳來，羅伯特才意識到，事態的發展是多么的糟糕。