Someone’s Knocking at the Door

Ray Harris, a med student, sits in his dorm room and experiments with the experimental drug Taldon. A knock on the door reveals a nude woman who makes sexual advances toward him, then morphs into a grotesque man who attacks him. It is strongly implied that the attacker rapes and murders Ray.

Ray is found dead after the brutal assault, and his death is later connected to the mysterious drug Taldon. The campus reels as investigators search for any link to the eerie incident. The murder casts a shadow over the student circle and their safety.

Meg, Joe, and Annie learn that Ray has died and gather to mourn his loss. The tragedy triggers a mix of grief and suspicion within the group. With little concrete evidence, the survivors feel the net tightening around them.

Sebastian, another of Ray's friends, insinuates that Joe may have killed Ray in a bizarre sex game, since Joe was the last person seen with him. The accusation strains relationships and deepens the mystery. The group is left unsettled with few solid clues.

Justin joins Meg, Joe, Annie, and Sebastian at Ray's funeral, offering quiet support as they say goodbye. The mood is somber, and fear lingers beneath the surface. The gathering underscores the fragile ties among the survivors.

Police question the five remaining students, probing for any link to Ray's death. There is little hard evidence against anyone, so they are released with warnings. The investigation highlights the mystery and the lack of clear culprits.

A flashback reveals the group had previously used Taldon and studied the Hopper serial killer couple. They speculate the Hoppers might have returned via astral projection. The sequence ties their drug experiments to the unfolding horror.

Sebastian and Annie head to a secluded place in the woods to make out, but Annie grows uneasy with his aggression and is dropped off. She then confronts the demon Wilma Hopper, who uses supernatural methods to attack her. The danger ripples from the hospital into the surrounding woods.

Back at the hospital, the reanimated John Hopper attacks a detective who had been researching the case. He uses coercion and force, culminating in the detective's death. The hospital becomes a site of supernatural danger as the threat expands.

Meg and Justin share a romantic evening, strengthening their bond amid the rising dread. The moment of connection contrasts with the creeping sense that something monstrous is unfolding around them. The relationship adds personal stakes to the escalating nightmare.

Meg begins a focused study of Taldon and finds that it is a hallucinogen capable of dangerously stimulating the central nervous system. Her findings explain how the drug can trigger terrifying visions and ravage the mind. The discovery heightens the stakes for everyone involved.

Meg's research is interrupted when the undead detective from the Hopper case attacks her as she moves through the hospital corridors. She fights to escape as the supernatural threat encroaches further into the hospital. The danger now targets the researchers as well as the original victims.

John Hopper, taking the form of Annie, lures and murders Sebastian through deceptive seduction and coercive violence. The killer uses impersonation to strike another member of the circle, deepening the group's fear. The murder confirms that the Hopper presence has infiltrated their closest confidants.

Justin, convinced he is trapped in an artificial reality, shoots Joe and another detective before turning the gun on himself. The act of violence appears to be part of a larger illusion that envelops the night. His death leaves the remaining survivors in a sealed, surreal moment.

It is revealed that the events were Justin's dying hallucination, triggered by their Taldon overdose the night they first read about the Hopper spree. Meg survives, having sworn off drugs, while the others' fates are left to interpretation. The ending reframes the night's horror as a product of the drug and a troubled mind.