某個鄉村的一座老舊公寓裡，一個十四歲的少女素珍（沈恩京飾）突然失踪了。素珍的母親終日沈迷教會活動中，對女兒失蹤一事束手無策，終日寄望於祈禱中。在首爾念大學的希真（南相美飾）得知消息後馬上趕回家，報警後，警察泰煥（柳胜龍飾）只把素珍的失踪列為一般離家出走案

在翻查妹妹素珍的櫥櫃時掉下了一封信，信是村中一個自殺身亡的女孩鄭美寫給素珍的遺書。警衛貴甲和村民看了遺書的內容後紛紛認為素珍是被鬼附身了，民眾的謠言讓姐姐希真和泰煥陷入了混亂之中。第二天，警衛貴甲的屍體被發現，儘管一連串的怪事都與自己的教會有關聯，素珍的母親卻是如常參加教會的祈禱儀妹妹的行蹤仍然是個謎，而希真自從妹妹神秘失踪後，每晚都夢見已死去的人向她揮手。在素珍失蹤的那天，究竟發生過什麼事呢？

A 13-year old girl disappears at an old apartment building in the countryside. Hee-jin’s younger sister, So-jin, and her mother who is a Christian fanatic lives together in the countryside. One day, Hee-jin receives a call while she’s in Seoul going through college. Her mother tells her that So-jin has suddenly disappeared. Once she arrives, her mother tells her that only prayer can help So-jin return and she frequents the church all day. But Hee-jin calls the police instead and the detective in charge, Tae-hwan, conducts a routine operation and tells Hee-jin that So-jin simply can ran away from home. As Hee-jin keeps searching for So-jin, she falls deeper into a dark mystery that no one can understand.