Kristen, a young woman, is institutionalized after being found setting fire to a farmhouse. Taken to the North Bend Psychiatric Hospital, she is placed in a ward with four other women, each with their own distinct personalities and issues. Kristen quickly senses that something is amiss in the ward, especially when she experiences eerie apparitions and strange occurrences. She befriends some of the other patients and learns that a former patient, Alice, mysteriously disappeared. Kristen becomes determined to uncover the truth behind Alice's disappearance and the hospital's dark secrets. She finds herself subjected to questionable treatments and monitored closely by Dr. Stringer and the nursing staff.

As Kristen's investigation deepens, the disappearances of her fellow patients increase, and she begins to experience severe, horrifying visions. Her attempts to escape the hospital are thwarted by relentless and unseen forces. Kristen's grip on reality starts to fray as she uncovers more about Alice and the institution's sinister history. The tension escalates, leading Kristen to question her own sanity and the reality of the world around her.