It stars Daniella Pineda as a woman who is released from a psychiatric hospital 15 years after stabbing a classmate because of an urban legend about a ghost known as Mercy Black.

While facing her past to help Bryce avoid the same fate, Marina questions whether Mercy Black is merely a delusion of her own creation.

When Bryce flees out the door, he runs straight into the arms of the librarian, who turns out to be Lily Bellows, the girl Marina and Rebecca intended to sacrifice.

Producers wanted the protagonist to be innocent, but Egerton told them that the story depended on facing one's past.

[6] Noel Murray of the Los Angeles Times compared it favorably to Slender Man, calling it "nerve-wracking throughout".

[7] Matthew Monagle of The Austin Chronicle rated it 2/5 stars and criticized the film for exploiting mental illness as a plot device instead of making intelligent observations.

[8] William Bibbiani of IGN rated it 5.5/10 and wrote that the film fails to live up to its disturbing premise because of the poor writing and direction.