What Is A Useful Ghost About?
The premise of A Useful Ghost in 308 words, with nothing given away. The full story follows below.
In a haze‑shrouded Thai metropolis where relentless construction churns up clouds of dust, the line between the material and the uncanny blurs. The city’s restless modernization has left its inhabitants coughing and its factories groaning under the weight of old grievances. Within this unsettled landscape, a modest apartment becomes a focal point for the supernatural when a newly purchased vacuum cleaner begins to whisper with an unseen presence. The atmosphere is simultaneously wistful and absurd, a darkly comic meditation on loss, memory, and the pollutants that linger far beyond the physical.
March, a gentle and grief‑stricken husband, is still reeling from the death of his beloved Nat and the unborn child they were to raise. As he navigates his sorrow, Nat’s lingering affection refuses to fade; her spirit finds an unlikely anchor in the very appliance meant to cleanse his home. Their fragile bond draws the attention of a nearby electronics factory, now stalled by an angry specter—the restless soul of Tok, a worker who perished on the job. The factory’s heir, Suman, confronts the haunting that threatens to shut down the enterprise forever, while a quick‑acting repairman named Krong offers explanations that are as enigmatic as they are unsettling.
The film weaves together bureaucratic inertia, familial expectations, and the quiet yearning of a ghost determined to prove her worth. Against a backdrop of incense‑filled temples, fluorescent office lights, and the perpetual whir of machinery, the characters grapple with the question of what it means to be “useful” when the line between life and afterlife is so porous. Their intertwined desires—to revive a dying plant, to heal a broken heart, and to reconcile the living with the lingering—create a tone that is simultaneously tender, eerie, and laced with sly humor, inviting the audience to wonder whether redemption can truly be vacuumed up from the dust of the past.
What Happens in A Useful Ghost?
The complete story of A Useful Ghost, from the first scene to the last, in 1,002 words (about 4 minutes). Spoilers throughout. Names in the text link to 5 cast member pages.
Spoilers ahead
Academic Ladyboy is overwhelmed by the dust stirred up by his city’s renewal projects and buys a vacuum cleaner to tidy his apartment. At night he hears the vacuum cough, and in the morning discovers it has expelled the dust it had cleaned. He calls a repairman who arrives almost instantly. The repairman, Krong, explains that the vacuum is physically fine but haunted by a ghost, and that many spirits haunted the factory that produced it. Smitten with the handsome Krong, the Academic Ladyboy lets him tell the tale of the haunted factory.
Suman, the heir of her late husband’s electronics factory, is troubled by the vengeful spirit of Tok, an employee who died of congenital heart disease on the job. Tok blames the factory for his death and frequently interrupts work by possessing machinery and angrily complaining. Tok is anchored to the physical world because someone close to him remembers his life. Tok’s spirit violates hygiene regulations, and Suman loses her license to operate the factory, forcing it to close.
March, the younger of Suman’s two sons, is mourning the recent loss of his wife Nat and their unborn child to a respiratory disease. While attending an investigation into Tok’s haunting of the factory, March sees Nat’s spirit walking into an inventory warehouse and follows her. Nat possesses a vacuum cleaner and seduces March. His family and religious authorities are disturbed to discover the young man engaging with a haunted appliance, and March is taken to a hospital.
Nat, still attached to the vacuum cleaner, travels to the hospital to visit March. On the way, she befriends Dr. Paul, the Prime Minister of Thailand, by cleaning the dust irritating his eyes. March now sees Nat as a human, and the two happily reunite, but Suman is again disturbed to find him making out with a vacuum. Nat stays with March through his stay at the hospital and the two discuss restarting their family by utilizing Nat’s frozen eggs.
Under pressure from her conservative in-laws, who never liked Nat, Suman confronts Nat with Buddhist monks who attempt to exorcise her. Nat is unfazed, and Suman responds by accusing her of stealing the vacuum cleaner, having it confiscated and disassembled by police. Dr. Paul intervenes, citing Nat as a “good ghost” who should be supported, dropping the charges and repairing the appliance. Frustrated, Suman resorts to having March committed to a psychiatric institution where he receives electroshock therapy designed to damage his memory; if he forgets Nat, her bond to the physical world will be severed and she will disappear.
Nat still manages to see March by entering his dreams, but as the therapy continues her form begins to fade. Nat enters Suman’s dream, where she vents her resentment of her in-laws, and pleads for her to stop the treatment. Having been financially backed into a corner due to the ongoing haunting and the factory’s closure, Suman strikes a deal with Nat.
The factory is “re-opened,” but it is a ruse to gather the employees and drug them to sleep so that Nat may systematically enter their dreams and deduce whose memories are allowing Tok to haunt the factory. Nat discovers Tok visiting his boyfriend Pin’s dreams, and Suman confronts Pin. She offers an ultimatum: receive electroshock therapy to forget Tok, or lose his job. This triggers a violent attack from Tok, possessing a refrigerator, and Nat intervenes to save Suman’s life. Pin is escorted away to receive the therapy, and having earned a reputation as a good ghost by saving Suman and the factory, Nat is now seen by everyone in her human form.
Dr. Paul summons Nat and March to his home, ostensibly to celebrate her, but ambushes them with a group of political and military figures who are haunted by ghosts stemming from violence they have perpetuated or benefited from. Some ghosts are fueled by the direct memories of loved ones, others by political dissidents familiar with history. Dr. Paul begs Nat for help and has rigged the electroshock therapy lab so that it can be used to systematically investigate dreams and “treat” those who remember ghosts. Nat refuses the unethical request, but when Dr. Paul offers to clear the bureaucratic red tape preventing her and March from using her frozen eggs, she agrees.
Nat’s project to mass-exorcise politically inconvenient ghosts is successful, but disgusts March and drives a wedge between the couple. March claims that Nat has changed so much he is forgetting who she used to be, and attempts to keep the memory of the eradicated ghosts alive by studying the history of political violence. On the day Nat receives her baby, she betrays March to Dr. Paul. However, before this information can be acted upon, March has a coughing fit that knocks over a bust of Nat commissioned by Dr. Paul; the bust falls on March and sends him to the hospital, the injury causing him to either die or forget Nat for good. Nat fades away, leaving a regretful Suman alone in the hospital with the baby.
Over the course of telling the story, Krong finds himself attracted to the Ladyboy’s growing distaste for Nat’s actions and her willingness to sacrifice her own kind for her personal gain. The two make love, and the Academic Ladyboy deduces that Krong is not actually the repairman but the ghost haunting his vacuum. Krong reveals that he was murdered by having his feet encased in concrete and being thrown into a lake; he is tied to the physical world by his daughter’s memories, which, thanks to Nat, are almost completely destroyed by Dr. Paul’s electroshock therapy. They make love again, and the Ladyboy vows to remember Krong as the ghost disappears.
The Ladyboy dives into the lake and retrieves the concrete block containing Krong’s feet, delivering them to Dr. Paul. Reconstituted by this act, Krong and a group of other vengeful ghosts invade Dr. Paul’s home with the help of his staff and kill him, his family and associates.
A Useful Ghost Timeline: Every Key Event in Order
15 key events in the order they happen, from “Dust-stirred renewal prompts vacuum purchase” to “Krong's murder revealed and the final ghostly assault”. 15 events name a place, across 9 locations.
- 1
Dust-stirred renewal prompts vacuum purchase
Amid the dust from city renewal, the self-described academic Ladyboy buys a new vacuum to tidy his apartment. He overhears the machine coughing at night, and in the morning discovers it has expelled the dust it had cleaned. The unsettling spectacle sets the stage for a haunting beyond cleaning.
When:Evening Where:Apartment
- 2
Repairman Krong reveals the vacuum is haunted
The repairman Krong arrives and explains that while the vacuum is physically fine, it is haunted by a ghost. He mentions that many ghosts haunt the factory that produced it. The Ladyboy is smitten with Krong and invites him to narrate the tale.
When:Night Where:Apartment
- 3
Tok's haunting disrupts the electronics factory
The spirit Tok invades the factory by possessing machinery and disrupting work, blaming the plant for his death from congenital illness. His presence keeps interrupting operations and endangers workers. Tok remains anchored to the physical world because someone close to him still remembers his life.
When:Daytime Where:Electronics factory
- 4
March mourns Nat; Nat's spirit appears in the warehouse
March, grieving his wife's death and unborn child, encounters Nat's spirit in an inventory warehouse and follows her. Nat possesses a vacuum and seduces March, complicating the family's grief with a haunting romance. The event unsettles the family and sets in motion a surreal love affair.
When:Evening Where:Inventory warehouse
- 5
Nat visits March and befriends Dr. Paul
Nat travels to the hospital to visit March and, on the way, cleans the dust from Dr. Paul's eyes, befriending him. March begins to see Nat as a human presence rather than a mere haunting. Their evolving relationship anchors Nat in the living world for a while.
When:Night Where:Hospital
- 6
Nat and March reunite; discussion of a future family
Nat stays with March during his hospital stay, and the pair reconnect emotionally. They discuss starting a family using Nat's frozen eggs, blending love and a supernatural possibility. The relationship deepens despite the strangeness surrounding them.
When:Evening Where:Hospital
- 7
Suman confronts Nat with monks; exorcism begins
Suman accuses Nat of stealing the vacuum and arranges its confiscation and disassembly by police. Buddhist monks attempt to exorcise Nat, while Dr. Paul intervenes and argues that Nat is a good ghost deserving protection. The conflict intensifies as the state and the church clash with a supernatural presence.
When:Daytime Where:Factory
- 8
Electroshock therapy targets March; memory under threat
Under pressure, March is committed to a psychiatric ward where electroshock therapy is used to erase memories that anchor Nat to the physical world. The officials hope erasing March's memory will dissolve Nat's bond to reality. Nat's presence teeters on the edge as the therapy proceeds.
When:Morning Where:Hospital
- 9
Nat enters dreams; Suman is drawn into the bargain
Nat begins to invade dreams, including Suman's, seeking a way to extend her influence. The ongoing haunting leaves Suman cornered financially and emotionally, pushing her to strike a deal with Nat. The bargain promises relief but shifts the power balance among the living and the dead.
When:Dream sequence Where:Dream world
- 10
Factory reopens as a cover for dream-deduction
The factory is reopened not to resume work, but to drug employees into sleep so Nat can systematically enter their dreams. Nat traces memories to identify whose recollections permit Tok to haunt the factory and confronts Pin about his knowledge. The plan to use dreams as a ledger of memories takes shape.
When:Night Where:Factory
Show the other 5 events of A Useful Ghost Hide the last 5 events
- 11
Tok attacks via refrigerator; Nat becomes a good ghost
Tok possesses a refrigerator and launches a violent attack, but Nat intervenes to save Suman. Pin is escorted away to receive electrotherapy, isolating him from Nat's orbit. Nat's actions elevate her status, and she appears more openly in human form to those around them.
When:Night Where:Factory
- 12
Dr. Paul seeks Nat's help in mass-exorcising ghosts
Dr. Paul invites Nat and March to his home, ostensibly to celebrate Nat, but uses them as part of a plan to purge ghosts tied to violence. He rigs electroshock therapy to probe dreams and memories. Nat refuses the unethical path but agrees to help if bureaucratic red tape is cleared to allow her and March to create a family.
When:Evening Where:Dr. Paul's home
- 13
Nat's mass-exorcism project divides the couple
Nat's project to mass-exorcise politically inconvenient ghosts is successful, but it unsettles March and sours their relationship. He worries that erasing memory is erasing history, prompting him to study political violence to preserve memory. The marriage strains under the weight of Nat's work.
When:Day Where:Factory
- 14
Birth day, betrayal, and memory-erase turning point
On the day Nat is to receive her baby, she betrays March by handing him over to Dr. Paul. A coughing fit topples a Nat bust, sending March to the hospital, and the memory of Nat begins to fade. Nat's bond to the living world weakens, leaving Suman alone with the baby.
When:Day Where:Hospital/Dr. Paul's home
- 15
Krong's murder revealed and the final ghostly assault
Krong reveals to the Ladyboy that he was murdered by having his feet encased in concrete and tossed into a lake. His bond to the living is kept alive by his daughter's memories, which Nat's therapy nearly destroys. The Ladyboy retrieves Krong's feet from the lake, strengthening his ghostly presence and setting up a final confrontation.
When:Night Where:Lakeside and Dr. Paul's home
Who Are the Main Characters in A Useful Ghost?
6 characters, among them Academic Ladyboy (Wisarut Homhuan), Nat (Davika Hoorne) and Suman (Apasiri Nitibhon): who each one is and the part they play in the story. Every profile links to the actor’s page.
- AL
Academic Ladyboy (Wisarut Homhuan)
Played by Wisarut Homhuan
A self-described academic figure whose life is upended by city dust and spectral tales. He serves as a reflective observer, drawing connections between memory, desire, and the supernatural. Through his perspective, the film explores identity, power, and what it means to remember.
- 🧭 Perspective
- 🧠 Identity
- 👻 Specter
- N(
Nat (Davika Hoorne)
Played by Davika Hoorne
A ghost inhabiting a vacuum cleaner who later manifests in human form. Her return unsettles March and rekindles a troubled romance, while she pursues a plan to secure a future for herself and her partners. She embodies both tenderness and ruthless survival as a 'good ghost' with a political edge.
- 👻 Spirit
- 💞 Love
- 🧬 Reproduction
- S(
Suman (Apasiri Nitibhon)
Played by Apasiri Nitibhon
Heiress of a late husband’s electronics factory, she becomes entangled in Tok’s haunting and the regulatory fallout that follows. Her resistance to Nat’s influence and her drive to save the factory push her into conflict with tradition and state authority. Her arc centers on power, duty, and maternal concern for her business and workers.
- 💼 Business
- ⚖️ Ethics
- 👪 Family
- M(
March (Wisarut Himmarat)
Played by Wisarut Himmarat
Suman’s son who is grieving Nat and their unborn child. His encounters with Nat strain family bonds and push him toward the hospital and Dr. Paul’s controversial program. He embodies desire, fragility, and a longing to preserve love in a world of political ghosts.
- 💔 Family
- 💞 Love
- 🧠 Memory
- K(
Krong (Wanlop Rungkumjad)
Played by Wanlop Rungkumjad
A repairman who reveals himself as a ghost haunting a vacuum and the factory. He was murdered by having his feet encased in concrete and thrown into a lake, and his memory lingers through his daughter's memories. He partners with the Ladyboy, only to be murdered again, seeking vengeance and release for the living.
- 👻 Ghost
- 🧠 Memory
- 🗡️ Revenge
- M(
Mother (Thityanan Phoungbut)
Played by Thityanan Phoungbut
Conservative mother-in-law figure who distrusts Nat and resists modern changes. She pushes Buddhist exorcism and legal action against the haunting, reflecting traditional authority and family protection dynamics. Her stance highlights the clash between old-world norms and spectral justice.
- 👵 Family
- 🗣️ Tradition
- 🛡️ Authority
Where and When Is A Useful Ghost Set?
A Useful Ghost is set in Thailand. Here is why the place matters to the story.
Where
Thailand
Set in Thailand, the film centers on a city in the throes of renewal, where dust from construction seeps into homes and factories. The primary settings span a family electronics factory, dusty warehouses, a hospital, and a lakeside area, all bound by haunting memories. The blend of modernization and spiritual unrest creates a tension between progress and memory.
- 🏙️ Urban
- 🏗️ Renewal
- 🏞️ Landscape
What Are the Themes of A Useful Ghost?
4 ideas the story keeps returning to, among them Haunting, Love and Loss and Power and Ethics.
-
01
Haunting
Spirits linger in machines and spaces, linking past violence and present life. Tok's ghostly interruptions and Nat's haunting drive the plot, challenging characters' sense of memory and guilt. The film uses ghosts to explore how memories of labor, love, and politics linger in the urban landscape.
-
02
Love and Loss
Relationships are tested by grief and desire, crossing boundaries between the living and the dead. Nat's return and March's grief drive intimacy and conflict, forcing families to confront what it means to restart life. The ghostly romance complicates loyalty and identity.
-
03
Power and Ethics
The narrative pits political power against personal memory, as Dr. Paul and government figures seek to weaponize ghosts for control. Electroshock therapy and mass-exorcism plans reveal dangerous ethics when memory can be manipulated or erased. The film questions who benefits from suppressing historical violence.
-
04
Industry and Memory
Urban renewal and factory life clash with the spectral past, showing how technology and labor histories haunt the present. The reopened factory acts as a stage for memory, where dreams, eggs, and ghostly memories converge. The story suggests that progress cannot be separated from the memories of those who built and suffered within the industrial world.
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 complex and unsettling supernatural thriller that darkly explores love and grief through a ghost-tormented world, building to a tragic conclusion where the eradication of memory becomes a political tool.
- unsettling
- melancholic
- eerie
- somber
- defiant
- dreamlike
- grief and loss
- supernatural romance
- political oppression
- memory and identity
Content notes: electroshock therapy, murder, psychological trauma.
Quiz
How well do you remember A Useful Ghost? Test yourself on the story.
Where to Watch A Useful Ghost
Stream it on Amazon Prime Video and Fandor, or rent or buy it from Amazon Video and Apple TV Store. US availability and prices from JustWatch.
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Amazon Prime Video 
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Fandor Amazon Channel 
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Kanopy 
Midnight Pulp Amazon Channel 
Philo 
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