本片由克里欧·巴纳德自编自导，影片改编自罗斯·特瑞美2010年的小说，故事围绕一对力图摆脱过往家庭伤痛的兄妹展开。

　　A teenage girl with self-esteem issues finds confidence in the most unlikely way, by spending her summer battling vampires that prey on New Orleans' disenfranchised with the help of her best friend, the boy she's always pined for, and a peculiar rich girl.

　　Writing the perfect suicide note isn't easy. Murdering a garage full of people is also pretty hard. But getting your victims to like you while you kill them, that's the really tricky part.

随着她母亲的去世和痛苦的离婚，安妮和她的女儿搬回她童年的家。起初一切似乎很好，但悲剧再次发生时，在一个雾蒙蒙的晚上，艾米丽失踪了从她的卧室。安妮声称她从黑暗中看到了什么东西，并带走了艾米丽……一个生物。

一个患有广场恐惧症的年轻人（亨利）和一个优酷和挣扎的演员（埃里克）住在一起，窃听年轻女性的网络摄像头，怀疑其中一个是连环杀手。