A Useful Ghost

The film is set in Thailand, specifically in a city undergoing renewal where dust from construction permeates homes and factories. Key locations include a family electronics factory, dusty warehouses, a hospital, and a lakeside area. The setting creates tension between modernization and spiritual unrest.

The film incorporates Thai Buddhist beliefs and traditional views on spirits, as represented by the Mother character who advocates for Buddhist exorcism. The concept of ghosts inhabiting objects like vacuum cleaners reflects cultural beliefs about spirits lingering in the physical world. This blend of modern industrial settings with supernatural elements creates a distinctly Thai horror-fantasy atmosphere.

The haunting theme centers on spirits lingering in machines and spaces, linking past violence with present life. The ghosts of Nat and Krong challenge characters to confront memory and guilt. The film suggests that memories of labor, love, and political violence persist in the urban landscape, particularly within industrial spaces like the factory.

The film tests relationships through grief and desire, crossing boundaries between the living and the dead. Nat's return as a ghost and March's mourning drive both intimacy and conflict. The ghostly romance forces families to confront what it means to continue loving and building a life when death has intervened, complicating loyalty and identity.

The narrative presents political power being used against personal memory, as characters like Dr. Paul and government figures attempt 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 and whether such control is ever justified.

Urban renewal and factory life clash with the spectral past, showing how technology and labor histories haunt the present. The reopened factory serves as a stage for memory, where ghostly remnants of workers and their suffering converge with modern production. The story suggests that progress cannot be separated from the memories of those who built and suffered within the industrial world.

Nat is a ghost who initially inhabits a vacuum cleaner before manifesting in human form. She returns to March after her death from dust pollution, embodying both tenderness and ruthless survival as a politically-engaged 'good ghost.' Her goal involves securing a future for herself and her partners while proving her love through action.

March is driven by grief over Nat and their unborn child. His encounters with Nat strain family bonds and expose him to Dr. Paul's controversial program. He embodies desire, fragility, and a longing to preserve love in a world where political forces manipulate ghosts and memory.

Krong is a repairman revealed to be a ghost haunting both the vacuum and the factory. He was murdered by having his feet encased in concrete and thrown into a lake. His memory persists through his daughter's memories. He partners with the Academic Ladyboy but is murdered again, seeking vengeance and release for the living.

Suman is the heiress of her late husband's electronics factory. She becomes entangled in Tok's haunting and the regulatory consequences that follow. Her resistance to Nat's influence and drive to save the factory create conflict with both tradition and state authority. Her arc centers on power, duty, and maternal concern for her business and workers.

The Academic Ladyboy serves as a reflective observer who draws connections between memory, desire, and the supernatural. Through his perspective, the film explores themes of identity, power, and what it means to remember. He becomes entangled with Krong's ghost, using his academic lens to interpret the spectral events unfolding around him.

The film blends Comedy, Drama, Fantasy, Horror, and Thriller genres. Despite an initially whimsical premise of a ghost in a vacuum cleaner, the tone remains dark with serious themes of exploitation, betrayal, and loss. The tonal shift from whimsical to bleak reflects the story's exploration of grief, institutional cruelty, and the destruction of personal identity.