While on a class observation trip at a local mental hospital, young psychology major Abby Jones, has a chilling encounter with high-risk patient, Harmon Porter. She returns home for an evening of normal study with her two roommates unaware of the darkness she’s awakened within him. Later that evening a storm moves in, while Harmon escapes leaving a trail of death, as he makes his toward an unsuspecting Abby.

Meanwhile, Abby and her roommate Lynn receive a visit from Carter Thomas, the neighbor cop across the street, warning them about a local peeper lurking in the area. He reassures them that he is close by and as long as they keep their curtains closed and doors locked they are safe. Little do they know, not even Carter can protect them from the rage unleashed by Harmon’s newfound obsession, Abby.

Secure in Carter’s cocoon of safety, the girls continue studying into the wee hours of the morning seemingly sheltered by the horrific events happening around them. As the girls sleep, the storm takes a turn for the worse, darkening the neighborhood and trapping them in Harmon’s web of terror.