馬奇夫人（勞拉·鄧恩 Laura Dern 飾）有著四個如花似玉的女兒，大女兒梅格（艾瑪·沃森 Emma Watson 飾）擁 有著美麗的外表，和對于愛情的天真憧憬。二女兒喬（西爾莎·羅南 Saoirse Ronan 飾）滿腦子塞著古靈精怪的念頭，整天拿著蘸水筆東寫西寫，她的故事在全家上下都受到了熱烈的歡迎。三女兒艾米（佛羅倫斯·珀 Florence Pugh 飾）渴望成為一名畫家。最小的女兒貝斯（伊萊扎·斯坎倫 Eliza Scanlen 飾）雖然個性比起三個姐姐要來的內向的多，卻擁有杰出的音樂天賦。在馬奇夫人的教導之下，四個姑娘漸漸成長為了擁有獨立人格的杰出女性，她們熱情、樂觀、善良，每個人都在各自的道路上堅強而又堅定的前進著。

　　一個想拍攝出恐怖紀錄片的劇組在網路上發布了試鏡公告，表明他們要找尋隱藏于現實生活中的駭人怪物，沒想到有三個自稱獸行者、吸血鬼與惡魔的報名者要前來試鏡。他們相約于月全蝕之夜，在一棟森林中的偏遠豪宅見面，原本只是要請對方分享自己的靈異經驗，沒想到竟弄假成真，變調成一場揮之不去的恐怖夢魘。

　　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...

　　經歷了最可怕的一段過去，可奈（大島優子 飾）已經精神接近崩潰，殘酷命運的安排，讓她最終也無法逃脫半身死靈“嗒卡嗒卡”的獵殺。路過事故現場的水谷菜月和中島玲子是就讀同一所高中同一班級的好友，她們的學校即將舉行文化祭。擔任文化祭委員的玲子無意中觸怒了班內小集團的頭頭刀根繪梨香，由此遭受了無休無止的孤立和欺凌。菜月看在眼里，卻不敢組織，只能隨波逐流。終于有一天，再也無法忍受的玲子將希望寄托在半身死靈身上，她將與繪梨香親近的同學相繼騙到人行天橋，目睹她們被獵殺的殘忍一幕。　　菜月終于發現了好友的秘密，她嘗試阻止，并且了解到半身死靈的背景和不為人知的過去，可是為時已晚……