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Demonoid (1981) Plot Summary & Timeline

Demonoid (1981) movie poster

Demonoid is a 1981 horror film directed by Alfredo Zacarías, running 1 hour 20 minutes. This page retells the whole story in 546 words (about 2 minutes to read) and covers 14 key events in order, 7 characters, where and when it is set and 4 themes. Looking for the cast, ratings and where to stream it? See the movie page for Demonoid.

to read the plot summary
2 min
key events in the timeline
14
characters profiled
7
themes explained
4
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Demonoid (1981) movie poster
Released
Runtime
1h 20m
Genre
Horror
Original language
English
No spoilers

What Is Demonoid About?

The premise of Demonoid in 260 words, with nothing given away. The full story follows below.

In the shadowed valleys of Guanajuato, an abandoned mine bears the weight of an ancient curse that has lingered for generations. The walls of the shaft are etched with forgotten rites, and the very air seems to hum with a malevolent presence that has kept locals at a respectful distance. When a British mining company decides to reopen the tunnel, the atmosphere shifts from historic curiosity to a palpable sense of foreboding, as the legend of the hand‑wielding demon begins to stir beneath the earth.

​Mark Baines arrives with the confidence of a modern entrepreneur, determined to prove that the old superstitions are nothing more than folklore. His wife, ​Jennifer Baines, follows him with a mixture of concern and resolve, eager to witness the venture that has drawn her husband away from home. The couple’s dynamic—Mark’s pragmatic optimism clashing with Jennifer’s cautious intuition—creates a fragile partnership that is tested the moment they step into the darkened tunnels, where the miners themselves refuse to go.

The mine’s hidden horror is whispered to reside in the left hand of those who dare enter, a cursed appendage that seems to awaken an inner darkness, urging its bearer toward unseen, wicked impulses. As the Baineses venture deeper, the oppressive silence is broken only by the faint echo of unseen forces, turning the cavern into a pressure cooker of dread. The film’s tone is relentlessly eerie, blending claustrophobic suspense with a creeping supernatural menace that promises to challenge every belief the couple holds about rationality, faith, and the unseen powers that linger beneath the surface.

Full plot

What Happens in Demonoid?

The complete story of Demonoid, from the first scene to the last, in 546 words (about 2 minutes). Spoilers throughout. Names in the text link to 5 cast member pages.

Spoilers ahead

Mark Baines and Jennifer Baines explore a grim Guanajuato mine where a satanic cult once built a temple and performed brutal rites, severing the left hands of their victims as offerings to the Devil. In the present day, the couple uncovers a small casket containing a severed hand and decide to take it back to their hotel room. That night, when Mark opens the container, he is violently seized and possessed by the monstrous hand, setting off a terrifying chain of events that pulls them into a nightmare they could never have imagined.

Their desperation drives them to Las Vegas, where the hand seems to unlock a dangerous luck for Mark as he wins a fortune at the gaming tables. Yet the possession gnaws at him from within, turning his fortune into a deadly curse as he tries to cut off the cursed limb. The botched attempt ends in tragedy when Mark is burned to death by his own hand, a macabre fate that also condemns his body to a burial in Los Angeles. Jennifer, shaken and alarmed, seeks help from Father Cunningham and warns that her husband might still be possessed, requesting an autopsy that could reveal the truth behind his death.

Before any examination can proceed, Mark’s horribly charred corpse inexplicably reanimates, bursting from the coffin and fleeing into the night. The nightmare accelerates when Sergeant Leo Matson arrives to investigate the strange events and is attacked by the undead Mark. In a brutal moment, Mark slams his left hand in a door, severing it from his own body; the hand then possesses the sergeant, pulling him into a new, violent obsession. Disturbed by his uncanny new appendage, Matson acts under its control, arresting Jennifer under false pretenses and heading toward a plastic surgeon’s office with sinister intent.

At gunpoint, Matson coerces Dr. Julian Rivkin into severing the hand, unleashing further horror when the severed hand shoots a nurse and brutally rips the sergeant’s face apart, killing him. The hand then possesses [Dr. Julian Rivkin], who is driven to cut his own hand off on train tracks, continuing the grisly chain of possession. The relentless force pursues Jennifer to a motel, but Father Cunningham intervenes, and together they manage to escape toward the church, convinced that the danger remains close behind them.

As the hand makes its way toward the church, it cuts the power and phone lines and stalks the fleeing duo. It succeeds in briefly possessing Father Cunningham, turning him against Jennifer with a knife. Yet Cunningham’s will proves strong enough to reclaim control, and he stabs his own hand to break the possession. Jennifer then helps him burn the severed hand with a blowtorch, scattering its ashes into the harbor in a final, symbolic attempt to end the menace.

Even after these desperate measures, the terror is not fully laid to rest. Back at a home of relative safety, Jennifer discovers that the hand somehow survived its cremation and returns to attack and kill her, leaving an ominous sense of dread that the darkness may not be easily quelled. The story follows a bleak, relentless march through possession and despair, where a single severed hand proves to be a conduit for an ancient evil that refuses to be laid to rest.

Timeline

Demonoid Timeline: Every Key Event in Order

14 key events in the order they happen, from “Cult forms temple and begins left-hand sacrifices” to “Jennifer's home is attacked by a surviving hand”. 14 events name a place, across 12 locations.

  1. 1

    Cult forms temple and begins left-hand sacrifices

    A satanic cult in a Guanajuato mine constructs a hidden temple and performs rites that require the removal of victims' left hands. These severed hands become a cursed relic tied to the Devil. The cult's grisly rites plant the seed for the horror that will surface centuries later.

    When:300 years ago Where:Guanajuato, Mexico

  2. 2

    Mark and Jennifer discover a severed hand

    In the present day, Mark and Jennifer Baines explore the temple and discover a small casket containing a severed left hand. They haul the ominous relic back to their hotel room, unaware of the danger it carries. The hand's dark influence begins to take hold as soon as it's disturbed.

    When:Present day Where:Temple in Guanajuato, Mexico

  3. 3

    Mark is possessed by the hand

    That night, the moment Mark opens the casket, the severed hand clamps onto him and takes control. He experiences a surge of strength and a frightening loss of free will under its grip. Jennifer senses something is wrong as Mark's eyes change and his voice grows cold.

    When:Night of discovery Where:Hotel room (Guanajuato)

  4. 4

    Flight to Las Vegas and winnings

    Fleeing the temple, Mark travels to Las Vegas while still possessed. He suddenly wins a large fortune at the gambling tables, seemingly guided by the hand. The win only deepens the possession and the danger he represents.

    When:Following possession Where:Las Vegas

  5. 5

    Mark attempts to cut off his hand; dies

    Desperate to end the possession, Mark tries to sever his left hand himself. The hand resists and, during the struggle, burns him to death with an otherworldly blaze. The burned body is left behind as the hand continues to act elsewhere.

    When:After fortune Where:Las Vegas

  6. 6

    Mark's body shipped to Los Angeles

    Mark's severely burned corpse is shipped to Los Angeles for burial, leaving Jennifer to confront the nightmare alone. The authorities suspect nothing unusual at first, but the corpse's odd burns hint at something supernatural.

    When:After death Where:Los Angeles

  7. 7

    Jennifer seeks autopsy and warns the priest

    Jennifer goes to Father Cunningham's church and warns him that Mark's body may still be possessed. She requests an autopsy to determine if the haunting has not ended with death. Cunningham agrees to consider the request and prepares to act.

    When:Soon after burial planning Where:Father Cunningham's church, Los Angeles

  8. 8

    Mark's corpse reanimates at the burial site

    During the burial preparations, Mark's charred corpse reanimates and bursts from his coffin, escaping into the night. The terrifying revival confirms that the hand's influence survives beyond death.

    When:During burial events Where:Los Angeles cemetery

  9. 9

    Sergeant Matson confronts the possessed hand

    Police Sergeant Leo Matson arrives to investigate and is suddenly attacked by Mark. The possessed left hand slams through a door, severing Matson's hand, and Mark collapses dead as the hand immediately possesses him. Matson's transformation into a host begins a new chapter of danger.

    When:Shortly after reanimation Where:Los Angeles

  10. 10

    Hand possesses Matson and targets Jennifer; plastic surgeon involved

    The hand possesses Matson and drives him to a plastic surgery office. He forces Dr. Julian Rivkin at gunpoint to sever the hand, and the hand then shoots a nurse and murders Matson by ripping his face off. The possession shifts to Rivkin as his own hand becomes the next vessel.

    When:After possession Where:Plastic surgery office, Los Angeles

Show the other 4 events of Demonoid
  1. 11

    Hand possesses Rivkin and severs his own hand

    The hand possesses Dr. Rivkin, who severs his own hand on a train track. The spree of carnage continues as the possessed doctor becomes the hand's next agent.

    When:After possession of Rivkin Where:Train tracks

  2. 12

    Hand corners Jennifer at motel; chase to church

    The hand corners Jennifer at her motel and again attempts to possess her, but Father Cunningham intervenes and helps them flee toward the church. They race between locations as the hand closes in.

    When:After Rivkin incident Where:Jennifer's motel and the church

  3. 13

    Cunningham battles the hand inside the church

    Inside the church, the hand briefly possesses Cunningham and attacks Jennifer with a knife. Cunningham manages to break free by stabbing his own hand, then Jennifer and he burn the hand off with a blowtorch, scattering its ashes in the harbor.

    When:During the church confrontation Where:Church and harbor

  4. 14

    Jennifer's home is attacked by a surviving hand

    Jennifer returns home, but the surviving hand finds her and attacks again. The hand kills her, ending the nightmare.

    When:After harbor scene Where:Jennifer's home

Characters

Who Are the Main Characters in Demonoid?

7 characters, among them Jennifer Baines (Samantha Eggar), Mark Baines (Roy Jenson) and Father Cunningham (Stuart Whitman): who each one is and the part they play in the story. Every profile links to the actor’s page.

  • JB

    Jennifer Baines (Samantha Eggar)

    Played by Samantha Eggar

    Wife of Mark Baines, she discovers the severed hand and becomes entangled in the ensuing possession scare. She seeks help from Father Cunningham and fights to protect herself, ultimately facing the possessed threat until the final confrontation.

    • 🧭 Courageous
    • 🕯️ Faithful
    • 💔 Grief
  • MB

    Mark Baines (Roy Jenson)

    Played by Roy Jenson

    Husband to Jennifer, he is possessed after taking the hand from the temple. He wins a fortune in Las Vegas through gambling, tries to sever the hand, and dies when the possessed hand burns him. His body later returns to the story via possession of others.

    • 🎲 Gambler
    • 🧩 Possessed
    • 🔥 Fatal
  • Stuart Whitman as Father Cunningham (Stuart Whitman) in Demonoid

    Father Cunningham (Stuart Whitman)

    Played by Stuart Whitman

    A priest who confronts the demonic hand, assists Jennifer, and attempts to stop the possession. He is briefly possessed but ultimately resists and destroys part of the threat with a controlled act of self-sacrifice.

    • ⛪️ Priest
    • 🛡️ Protective
    • ⚔️ Resolute
  • SL

    Sgt. Leo Matson (Lew Saunders)

    Played by Lew Saunders

    A police sergeant who becomes an accidental host to the hand, commits violent acts, and is killed when the hand rips his face off. His possession catalyzes the chain that spreads to medical professionals.

    • 👮‍♂️ Cop
    • 🖐️ Possessed
    • 💀 Violent
  • DJ

    Dr. Julian Rivkin (Narciso Busquets)

    Played by Narciso Busquets

    A plastic surgeon forced at gunpoint to sever the possessed hand. The hand takes him over, leading to further tragedy as he becomes another vessel for the possession.

    • 🧭 Doctor
    • 🧨 Possessed
    • 🩺 Medical
  • NM

    Nurse Morgan (Erika Carlsson)

    Played by Erika Carlsson

    A hospital nurse who is endangered as the possession spreads. She becomes a casualty when the hand uses a gun to attack.

    • 👩‍⚕️ Nurse
    • 🩸 Victim
    • 🛡️ Vulnerable
  • P(

    Pepe (José Chávez)

    Played by José Chávez

    A witness connected to the mine's past, whose presence foreshadows the ancient ritual that births the hand's evil.

    • 🧭 Witness
    • 🗺️ Historical
    • 🧱 Miner
Setting

Where and When Is Demonoid Set?

Demonoid is set in Guanajuato, Mexico, Las Vegas and Los Angeles (Present day, with a 300-year-old past). Here is why the time and place matter to the story.

When

Present day, with a 300-year-old past

The story weaves between a historical period about 300 years ago, when the cult performed its rituals, and modern times where the severed hand possesses people. Present-day events move from Las Vegas to Los Angeles and a church, culminating in a showdown near the harbor.

Where

Guanajuato, Mexico, Las Vegas, Los Angeles

The film centers on a Guanajuato mine where a satanic cult built a temple for sacrifices. In present day, a couple explores the temple, finds a severed hand in a small casket, and takes it back to their hotel, triggering a wave of possession. The action then shifts to Las Vegas, Los Angeles, and a harbor where the hand's influence, destruction, and ashes unfold.

  • 🗺️ Ancient mine temple
  • 🎰 Gambling hub
  • 🏙️ Urban centers
  • 🚢 Harbor
Themes

What Are the Themes of Demonoid?

4 ideas the story keeps returning to, among them Possession, Faith vs Evil and Body Horror.

  1. 01

    Possession

    A severed hand carries a malevolent force that can seize control of people. The possession spreads from Mark Baines to authorities and medical staff, creating a trail of fear and chaos. The plot centers on the struggle to resist or sever the link with the supernatural entity.

  2. 02

    Faith vs Evil

    Father Cunningham represents a last line of defense against the demonic presence. He confronts the possessed, aids Jennifer, and attempts to halt the spread of the evil. The clash between sacred ritual and malignant power drives the narrative.

  3. 03

    Body Horror

    The story features graphic transformations as a severed limb becomes a vessel for possession and violence. Characters are attacked, mutilated, or killed by the hand, intensifying the sense of bodily threat. The imagery emphasizes the persistence and reach of the evil force.

  4. 04

    Greed

    Mark Baines' wealth earned through gambling after possession illustrates how greed amplifies danger. The lure of fortune feeds reckless actions and accelerates the demon's spread. The hand exploits money-driven risk to deepen possession.

Tone & mood

What Kind of Film Is Demonoid?

Dark in tone, with fast pacing and a straightforward story, going by the plot summary.

Tone
Dark
Pacing
Fast
Story
Straightforward
Intensity
High
Ending
Bleak

A fast-paced and relentlessly bleak horror film that unfolds like a nightmarish chain reaction, where a disembodied demonic hand spreads violent possession, creating an atmosphere of constant dread and gruesome body horror.

  • relentless
  • nightmarish
  • claustrophobic
  • anxious
  • gory
  • grim
  • demonic possession
  • body horror
  • ancient evil
  • supernatural curse

Content notes: body horror, demonic possession, self-mutilation, burning to death, dismemberment, graphic violence.

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FAQ

Demonoid Plot Questions

5 quick answers about Demonoid, taken from the plot summary, character guide and setting on this page and the film’s credits.

What is Demonoid about?

In the shadowed valleys of Guanajuato, an abandoned mine bears the weight of an ancient curse that has lingered for generations. The walls of the shaft are etched with forgotten rites, and the very air seems to hum with a malevolent presence that has kept locals at a respectful distance.

Read the full plot summary

When and where does Demonoid take place?

Demonoid is set in Guanajuato, Mexico, Las Vegas and Los Angeles (Present day, with a 300-year-old past). The story weaves between a historical period about 300 years ago, when the cult performed its rituals, and modern times where the severed hand possesses people.

The setting explained

Who are the main characters in Demonoid?

The story follows Jennifer Baines (Samantha Eggar) (played by Samantha Eggar), Mark Baines (Roy Jenson) (played by Roy Jenson), Father Cunningham (Stuart Whitman) (played by Stuart Whitman) and Sgt. Leo Matson (Lew Saunders) (played by Lew Saunders); the character guide covers 7 characters in all.

All the characters

What are the main themes of Demonoid?

The summary picks out 4 themes: Possession, Faith vs Evil, Body Horror and Greed.

The themes explained

Who directed Demonoid?

Demonoid (1981) was directed by Alfredo Zacarías and runs 1 hour 20 minutes.

Alfredo Zacarías’s films

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