In a small town in the United States, a group of young paranormal investigators ventures into a dark and ancient psychiatric hospital, where chilling phenomena related to extremely unusual exorcism practices are said to occur. The group's leader, Mia, is a hardened skeptic who tries to debunk myths to prove that terror can be explained rationally. However, upon discovering an old diary that belonged to a nun who practiced forbidden rites, the team encounters a series of unsettling experiences that defy all logic.
As they unravel the mysterious past of the hospital, they begin to hear whispers and see shadows that seem to have a direct connection to a disturbing ritual carried out during a patient's pregnancy years ago. As they delve deeper into the secrets of the place, Mia starts to question her own sanity and the nature of evil. The visions intensify, and the group faces an entity that not only seeks revenge but also harbors a dark purpose that ensnares them in an endless cycle of terror.
With a montage of chilling scenes and surprising twists, the story culminates in a heartbreaking climax that will intertwine the fate of Mia and her friends with that horrifying exorcism. Between logic and the supernatural, will they be able to escape the clutches of the evil lurking in the shadows?