What Is A Useful Ghost About?
The premise of A Useful Ghost in 315 words, with nothing given away. The full story follows below.
In a bustling Thai metropolis where skyscrapers rise amid perpetual construction dust, the ordinary becomes a conduit for the extraordinary. The city’s relentless drive to modernize leaves a fine layer of particles that settles into every home, turning even the most mundane appliance into a silent witness to the lives that inhabit the space. Within this atmosphere of perpetual renewal, a quiet, intimate horror unfolds—a love that refuses to fade and a grief that lingers in the whir of a household device.
Nat, a mother who succumbed to a respiratory illness, has not entirely left the world she cherished. Her lingering affection takes shape in the most unexpected of vessels: a sleek, humming vacuum cleaner. When her husband March begins to show the same warning signs that once claimed her, the household appliance becomes more than a tool for cleaning; it turns into a protective presence, quietly intervening in a struggle that bridges the living and the dead. Their shared history, memories of a life together, and the everyday rhythms of domesticity are all refracted through the soft, metallic glow of this haunted object, creating a tender yet unsettling dynamic that drives the film’s emotional core.
The tone balances a gentle melancholy with a darkly comic surrealism, letting the audience feel both the warmth of familial devotion and the uncanny chill of unseen forces at work. The story is populated by characters who navigate a world where the line between technology and spirit is porous—repairmen who speak of lingering energies, bureaucratic structures that feel oddly out of step with the spectral, and a society that must reckon with the invisible weight of its own past. By weaving grief, love, and the absurdity of an enchanted vacuum into a richly textured portrait of modern life, the film invites viewers to contemplate how memory can inhabit the most ordinary corners of our homes, waiting to be heard.
What Happens in A Useful Ghost?
The complete story of A Useful Ghost, from the first scene to the last, in 971 words (about 4 minutes). Spoilers throughout. Names in the text link to 1 cast member page.
Spoilers ahead
In a city clawing its way back to modern life through sweeping renewal projects, a self-described “academic ladyboy” brings home a new vacuum cleaner to tidy his small apartment. At night the device coughs so loudly that the air seems to tremble, and by morning it has somehow expelled the very dust it had just collected. He calls for a repairman, Krong, Wanlop Rungkumjad, who arrives almost instantly and explains that the vacuum is physically fine but haunted by a ghost—one of several spirits tied to the factory that produced the device. The repairman’s tale pulls the man deeper into a world where memories and machines intertwine, and he invites Krong to tell the story of the haunted factory, inviting a stranger into his own haunted life.
Suman, the heir to her late husband’s electronics factory, is haunted by Tok, a resentful spirit who died on the job from congenital heart disease. Tok blames the factory for his death and frequently interrupts work by possessing machinery, his presence anchored in the world only because someone who remembers his life remains. Tok’s ghost flouts hygiene rules, pushing Suman to the brink and contributing to the factory’s decline as she loses her license and the business shuts down.
Meanwhile, March—the younger of Suman’s two sons—mourns Nat and their unborn child, both claimed by a respiratory illness. While investigating Tok’s haunting, March glimpses Nat’s spirit in an inventory warehouse and follows her. Nat possesses a vacuum and seduces March, a revelation that unsettles his family and religious authorities and lands him in hospital. Nat, still bound to the vacuum, travels to the hospital to visit March, and their reunion rekindles a fragile hope. Nat envisions a future they might share, even contemplating using Nat’s frozen eggs to start a family again, a plan that would bind the past to a possible future.
Nat’s presence—and her growing bond with March—draws in Dr. Paul, the Prime Minister [Gandhi Wasuvitchayagit], who intervenes as Nat’s story collides with politics and power. Dr. Paul works to shield Nat and March, pressing for a more ethical handling of her condition and the vacuum’s haunting. Yet conservative in-laws push back, and Buddhist monks attempt to exorcise Nat; Suman, however, confronts them with a stark choice between science, religion, and the ghosts that haunt their lives. Dr. Paul argues for a more nuanced approach, and with his help the charges against Nat are dropped as he repairs the appliance and reframes her role as a “good ghost” who can still influence the world for the better.
As the factory is reopened under the banner of progress, Nat undertakes a radical project: she uses her ability to enter dreams to learn which memories sustain Tok’s haunting in the workers. In this dreamscape, Tok visits the dreams of Pin, a worker, and Suman confronts Pin with an ultimatum: undergo electroshock therapy to forget Tok or lose his job. Tok weaponizes the situation by possessing a refrigerator, creating a dangerous clash that Nat must stop in order to protect Suman and the factory’s fragile revival. Through her intervention, Nat becomes more visible to others, and her status as a benevolent ghost grows.
Dr. Paul eventually orchestrates a more controversial arrangement, inviting Nat and March to his home to celebrate their efforts—an apparent moment of triumph that spirals into a scene with political ghosts from history. These spirits—haunting figures connected to violence in power—press Nat to use her eggs and help them “cleanse” the past. Nat resists, but the promise of clearing bureaucratic obstacles leads her to consent.
The plan succeeds in purging many of the politically inconvenient ghosts, but it strains Nat and March’s relationship. March fears that Nat has changed too much, to the point where she might forget who she used to be. He clings to the past and pursues a study of political violence to keep the memory of the ghosts alive. When Nat becomes pregnant, a difficult betrayal follows: Nat agrees to cooperate with Dr. Paul to secure the future she desires, even as March watches his world crumble around him.
A violent turn comes when a coughing fit at a critical moment topples a bust of Nat, injuring March and leaving him in the hospital with the fear that Nat’s bond to him may vanish forever. Nat begins to fade, and a heavy sense of loss settles over the hospital, leaving Suman alone with the baby she did not expect to raise.
Amid these twin stories—the Ladyboy’s life and Krong’s restless ghost—Krong’s tale takes on new dimension. He reveals that he was murdered by feet encased in concrete and thrown into a lake, his physical existence tethered to the memories of his daughter, which Nat’s therapy has been eroding. The Ladyboy begins to see that Krong is more than a repairman; he is a ghost whose presence lingers in the vacuum that still sits in their shared life. They make love again, and the Ladyboy vows to remember Krong even as the ghost begins to fade.
In a bold, desperate act, the Ladyboy dives into the lake to retrieve the concrete block containing Krong’s feet and hands it to Dr. Paul. Reconstituted by this act, Krong and a chorus of vengeful spirits surge into Dr. Paul’s home, enacting a final reckoning that leaves him, his family, and his associates dead in the wake of their haunting.
This story-within-a-story unfolds through a tapestry of memory, loss, and the uneasy alliance between the living and the dead. It is a meditation on how progress can be a double-edged blade—how a city’s renewal can restore some lives while unearthing others, how love can endure even as it shifts shape, and how the line between healer and exploiter, guardian and aggressor, can blur when ghosts choose to intervene in the world of the living.
A Useful Ghost Timeline: Every Key Event in Order
14 key events in the order they happen, from “Ladyboy buys a vacuum that becomes haunted” to “Retrieving Krong's feet and the final ghostly assault”. 14 events name a place, across 10 locations.
- 1
Ladyboy buys a vacuum that becomes haunted
A self-described academic ladyboy buys a vacuum cleaner to tidy his apartment. That night the vacuum coughs oddly, and in the morning he finds it has expelled the dust it had cleaned. A repairman named Krong arrives and explains the vacuum is haunted, foreshadowing that the factory's ghosts are involved.
When:Evening Where:Ladyboy's apartment
- 2
Krong explains the haunting and the factory link
Krong explains the vacuum is haunted and that many ghosts haunt the factory where it was made. He hints that Tok's spirit lingers by possessing machinery and disrupting work. The Ladyboy becomes intrigued and asks him to tell the full tale.
When:Night Where:Ladyboy's apartment
- 3
Tok haunts the electronics factory
Suman, heir to the electronics factory, witnesses the vengeful ghost Tok blame the factory for his death and interrupt production by possessing machines. The ghost remains anchored because someone who remembers him still exists. The haunting disrupts operations at the factory.
When:Day shift Where:Electronics factory
- 4
Nat's spirit appears to March and seduces him via a vacuum
March, grieving his wife Nat and unborn child, sees Nat's spirit in an inventory warehouse. Nat possesses a vacuum to seduce March, who is brought to hospital by the encounter. The haunting turns personal as memories collide with the present.
When:Daytime Where:Inventory warehouse
- 5
Nat visits March in hospital and reconnects with Dr. Paul
Nat travels to the hospital to visit March. She befriends Dr. Paul by cleaning dust from his eyes, and March is startled to see Nat as a human again. The two reconnect while Nat remains tethered to the vacuum in a strange, intimate bond.
When:Daytime Where:Hospital
- 6
Nat discusses starting a family with frozen eggs
Nat stays with March in the hospital and they discuss restarting their family by using Nat's frozen eggs. The idea blends longing with the strange reality of a ghostly pregnancy. The conversation deepens the overlap of life, memory, and haunting.
When:Hospital days Where:Hospital
- 7
Exorcism, confiscation, and a repaired vacuum
Under pressure from conservative in-laws, Buddhist monks attempt to exorcise Nat. Nat remains unfazed, and Suman accuses her of stealing the vacuum, which is confiscated by police. Dr. Paul intervenes, defending Nat as a good ghost, and the appliance is repaired.
When:Exorcism attempt Where:Suman's home
- 8
March is committed to electroshock therapy
Frustrated, Suman has March committed to a psychiatric institution where he undergoes electroshock therapy designed to damage his memory. The treatment aims to sever Nat's hold so she will disappear, but Nat can still enter his dreams. The situation grows more fragile as memories begin to blur.
When:After exorcism Where:Psychiatric institution
- 9
Nat enters dreams and negotiates to stay
Nat infiltrates March's dreams and then Suman's, seeking a way to stop the therapy. She negotiates with them inside the dreamscape, leveraging her influence to shape what remains of their memories. The therapy pressurizes the couple while Nat's presence lingers.
When:During dream therapy Where:Dreams and hospital
- 10
Factory reopening as a dream harvesting operation
The factory is reopened as a ruse to drug employees so Nat can enter their dreams and deduce whose memories allow Tok to haunt the factory. Nat discovers Tok visiting Pin's dreams, and Suman confronts Pin with an ultimatum: undergo electroshock therapy to forget Tok or risk losing his job. A refrigerator is possessed by Tok, Nat intervenes to save Suman, and Nat is now seen by everyone in her human form as a good ghost.
When:Renewal program Where:Factory
Show the other 4 events of A Useful Ghost Hide the last 4 events
- 11
Dr. Paul's plan and Nat's permission to use frozen eggs
Dr. Paul summons Nat and March to his home to celebrate Nat, but ambushes them with a group of ghosts who haunt political violence. He asks Nat for help mass-exorcising those ghosts and rigs the electroshock lab as a dream-treating tool. Nat refuses the unethical plan but agrees to clear bureaucratic red tape so she and March can use her frozen eggs.
When:Evening Where:Dr. Paul's home
- 12
Nat's mass exorcism succeeds but costs March
Nat's project to mass-exorcise politically inconvenient ghosts is successful, but it disturbs March and strains their relationship. He studies the history of political violence to keep memory alive. On the day Nat gives birth, she shares a betrayal with Dr. Paul, but a coughing fit causes a bust to fall on March, sending him to the hospital and possibly erasing Nat from memory.
When:Day of baby's birth Where:Hospital
- 13
Krong and the Ladyboy's romance and truth revealed
The Ladyboy grows attracted to Krong, who is revealed to be the ghost haunting the vacuum. Krong explains his murder—feet encased in concrete and thrown into a lake—and that his connection to the living is kept by his daughter's memories, which Nat nearly destroys. They share a kiss, and the Ladyboy vows to remember Krong as the ghost fades away.
When:Evening Where:Ladyboy's apartment
- 14
Retrieving Krong's feet and the final ghostly assault
The Ladyboy dives into the lake to retrieve Krong's concrete block feet and returns them to Dr. Paul, reconstituting Krong. Krong and a group of vengeful ghosts invade Dr. Paul's home and kill him, his family and associates in a final act of retribution.
When:Final confrontation Where:Lake and Dr. Paul's home
Who Are the Main Characters in A Useful Ghost?
8 characters, among them The Ladyboy, Tok and Suman: who each one is and the part they play in the story. 7 of them link to the actor’s page.
- TL
The Ladyboy
The self-described academic ladyboy narrator is overwhelmed by dust from the city’s renewal and cleans his apartment with a vacuum. He becomes entangled with Krong’s ghost and leads the audience through the haunted factory tale. His curiosity and affection for Krong drive personal revelations about memory, desire, and the afterlife.
- 🪬 Identity
- 👀 Perception
- 💃 Gender Fluidity
- T
Tok
Played by Katanyu Swangsri
The vengeful spirit of a factory employee who died of congenital heart disease. He habitually possesses machinery, blaming the factory for his death. His presence persists because someone close to him remembers his life, anchoring him to the physical world through memory.
- 👻 Ghost
- 😡 Anger
- 🧭 Memory
- S
Suman
Played by Apasiri Nitibhon
Heiress to the family electronics factory, troubled by Tok’s haunting and the ensuing regulatory troubles. She loses her license to operate the factory after Tok’s disturbances and faces pressure from conservative in-laws. Her decisions—especially confronting Nat—shape the factory’s fate and her family’s future.
- 🏭 Industry
- 🧭 Family
- ⚖️ Ethics
- N
Nat
Played by Davika Hoorne
A ghost bound to a vacuum who seeks to start a family with March by using Nat’s frozen eggs. She befriends Dr. Paul and later becomes a catalyst for mass-exorcism efforts. Nat’s humanity becomes more pronounced as she negotiates love, memory, and power, gradually revealing a more complex motive than simple haunting.
- 👻 Ghost
- 💔 Love
- 🧠 Mind
- M
March
Played by Witsarut Himmarat
Suman’s son and Nat’s lover who is grieving the loss of his wife and their unborn child to a respiratory illness. He is drawn to Nat’s human form and becomes entangled in hospital and dreamworld crossovers. His protective instincts clash with his longing for a family and his struggle with memory and identity.
- 💔 Loss
- 🏥 Hospital
- 💭 Dreams
- DP
Dr. Paul
Played by Gandhi Wasuvitchayagit
The Prime Minister of Thailand who intervenes in Nat’s case, promoting a controversial project to use electroshock therapy to explore dreams and memories. He seeks bureaucratic clearance to mass-exorcise politically inconvenient ghosts, leveraging science for political ends. His plans are ultimately challenged by Nat and the consequences unfold around him.
- 🏛️ Politics
- ⚖️ Ethics
- 🧪 Science
- P
Pin
Played by Guide Wachara Kanha
Tok’s boyfriend, whose dreams are a target of his spirits’ influence. Pin’s memories and dreams become a focal point in understanding Tok’s haunting. He represents a personal bond amid the broader social and political upheaval surrounding the factory and its workers.
- ❤️ Love
- 💭 Dreams
- 🧭 Memory
- K
Krong
Played by Wanlop Rungkumjad
The repairman who is revealed to be a ghost haunting his own vacuum. He was murdered by having his feet encased in concrete and thrown into a lake. His presence lingers through his daughter's memories, which Nat’s interventions threaten to erase, ultimately driving him to seek vengeance and closure with the Ladyboy.
- 👻 Ghost
- 🪨 Vengeance
Where and When Is A Useful Ghost Set?
A Useful Ghost is set in Thailand, electronics factory district, hospital, inventory warehouse, Dr. (Early 21st century). Here is why the time and place matter to the story.
When
Early 21st century
The events take place in a contemporary Thai environment, blending modern technology with ghost lore. The plot involves factory closures, political maneuvering, and experiments that rely on dream-bridging and electroshock therapy. It presents a present-day vibe where personal grief, corporate interests, and state power intersect in a tense, modern backdrop.
Where
Thailand, electronics factory district, hospital, inventory warehouse, Dr. Paul's home, lakeside area
The story unfolds in a Thai city undergoing aggressive renewal, with an electronics factory at its center. Key locations include the factory and its inventory warehouse, a hospital where March is treated, Dr. Paul’s residence, and a lake or waterfront where ghosts anchor to memories. The setting moves between urban renewal zones, industrial interiors, and intimate spaces where memories and spirits invade the ordinary.
- 🏙️ Urban renewal
- 🏭 Electronics factory
- 🏥 Hospital
- 🗝️ Haunted spaces
What Are the Themes of A Useful Ghost?
4 ideas the story keeps returning to, among them Ghosts and Memory, Love and Sacrifice and Power and Ethics.
-
01
Ghosts and Memory
Ghosts anchor themselves to the living through memories, shaping events in the factory and beyond. Tok’s spirit interferes with machinery, while Nat uses dreams to uncover who memory belongs to. The film treats memory as a battleground where personal histories influence corporate and political decisions. Ghosts illuminate how the past lingers in the present.
-
02
Love and Sacrifice
Nat’s relationship with March drives emotional conflict, especially as they strive to start a family amid haunting and social pressure. March is torn between loyalty to Nat and the demands of tradition and health institutions. Nat’s willingness to blur boundaries and sacrifice for a future complicates her own essence and the couple’s dynamic. The story probes how love can both heal and endanger those involved.
-
03
Power and Ethics
Dr. Paul’s use of dream-based exorcism to cleanse political ghosts exposes ethical ambivalence in wielding power. The living push to forget painful histories, while the dead press for remembrance. The mass-exorcism plan raises questions about manipulation, surveillance, and the trade-off between societal order and individual rights. The tale critiques the abuse of science and policy for political gain.
-
04
Dreams and Reality
Dreams become a weapon and a sanctuary, allowing Nat and March to explore memories that bind or free them. The dreamscape reveals truth and deception, challenging characters to discern what is real. The technology to enter dreams blurs the line between psyche and physical world, making memory a battlefield for justice and revenge. The narrative uses sleep as a portal to confront collective traumas.
What Kind of Film Is A Useful Ghost?
Dark in tone, with steady pacing and a complex story, going by the plot summary.
- Tone
- Dark
- Pacing
- Steady
- Story
- Complex
- Intensity
- High
- Ending
- Bleak
A darkly comic and emotionally heavy fantasy that combines tragic romance with a satirical critique of political memory, creating a uniquely melancholic and anxious atmosphere.
- macabre humor
- tragic romance
- political dread
- ghostly melancholy
- satirical edge
- anxious
- grief and loss
- memory and erasure
- political violence
- supernatural love
Content notes: electroshock therapy, murder, death of a spouse, forced medical procedures, political violence.
Quiz
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