In a New Jersey mental institution, a financial safety net is kept by operating a “release program” that lets a number of less-disabled patients return to society. The system is meant to ease the institution’s burden, but it hinges on careful screening and reliable records. When a computer error unexpectedly releases an especially dangerous patient, Howard Johns, the situation spirals into a brutal series of murders. Howard Johns, Solly Marx, begins stalking and slaughtering anyone he encounters, turning the quiet town into a place of fear and suspicion.
A vigilant psychiatrist at the hospital, Dr. Joan Gilmore, Dr. Gilmore, Belinda Montgomery discovers the blunder and pushes for action. She convenes an emergency meeting with the administrator, Dr. Anderson, and the rest of the staff, but she hits a wall when she’s told that Howard had supposedly died a week earlier. Unwilling to accept the official line, she follows the trail herself, seeking out the truth. Her pursuit leads her to the local newspaper, where she teams up with Mark McGowan, David Greenan, a reporter who believes her suspicions and agrees to help.
Mark’s investigation points to the sorority house in Barrington, New York, where a cloud of past violence surrounds Howard—a custodian who allegedly snapped after a hazing ritual that ended with the girls fatally injuring him. To test the theory, Gilmore goes undercover as a former sorority member, introducing herself to the house mother, Mrs. Collins, Viveca Lindfors, and to the sisters Jane, Cheryl, and Pam, who each carry their own tangled histories. Jane, Katherine Kamhi, is a central figure in this circle, and her presence becomes crucial as the investigation intensifies.
The story quickly turns tense. Gilmore’s undercover presence brings her into contact with Howard’s killer instinct, and she experiences a frightening encounter in the boiler room where the hazing murders once occurred. After reporting the incident to Sheriff Liggett, Sydney Lassick, she faces a wall of official denial; the hospital’s cover-up tactic becomes evident as the staff attempt to control the narrative and quietly contain the threat. Meanwhile, hospital aides Jesse and Virgil are dispatched to handle the situation at the sorority house, and danger closes in around Gilmore and Mark.
As the weekend unfolds, Mark and Jane reconnect with the other sisters and realize the danger isn’t limited to the building’s walls. Jane’s sister Susan, Daisy White, and Susan’s boyfriend Paul, Paul DeAngelo, are found dead near a lake after Howard’s brutal strikes. Back at the sorority, Howard strikes again, killing Cheryl and Pam, thrusting the group into a deadly game of chase and survival.
The pursuit leads Gilmore and Howard through a maze of corridors and stairs as the two avatars of fear collide in a climactic showdown in the house’s core. Gilmore fights to escape a trap that would crush her under a drilling mechanism—only to be saved by a last-minute intervention, though not without a high price. In the tense sequence, Jesse is killed during a brutal attack, further underscoring the peril of coming between Howard and his victims. Virgil is also slain as the chaos spirals.
In the final confrontation at the building’s main entrance, Gilmore gains the upper hand and overpowers Howard, ending his murderous spree. The revelation that shakes the film to its core arrives in a heart-wrenching twist: Mrs. Collins is Howard Johns’s mother, and she was the one who murdered the sorority girls years earlier to shield him from the hate and anger that his hazing ordeal had unleashed. The emergency responders arrive as the truth comes to light, reversing the illusion of a clean break between past sins and present danger. With the danger passed, Dr. Gilmore and Mark may finally find a path back to normal life, heading back to New Jersey together, carrying the cost of the truth they uncovered and the memory of those who were lost.
