Director Bong Joon-ho's film won the Academy Award for Best Picture in 2020, the first non-English-language film to do so, along with Best Director, Best Original Screenplay and Best International Feature. What follows walks through the plot in order, then explains the ending — the stone, the smell, the Morse code letter, and Ki-woo's final plan — and what the film is arguing about class.
Table of Contents
- The plot in order: how the Kims infiltrate the Park house
- What is actually in the basement?
- The ending explained: the birthday party, the smell, and the stone
- The final sequence: is Ki-woo's plan real?
- What the film means: vertical space and the line you don't cross
- Watching notes and common misreadings
- Frequently Asked Questions
The plot in order: how the Kims infiltrate the Park house
Ki-woo, the Kim son, is handed a tutoring job by his friend Min-hyuk, who also gives him a decorative "scholar's rock" as a gift. Ki-woo forges a university credential, his sister Ki-jung faking it on a computer, and starts teaching English to the Parks' teenage daughter, Da-hye. He immediately recommends an art therapist for the Parks' hyperactive young son, Da-song — his own sister, introduced as "Jessica," a stranger with an invented Illinois art-school background. From there the Kims replace the household staff. Ki-jung plants her underwear in the Parks' car to make the chauffeur look like he had sex in it; Mr.
Park fires him, and Ki-taek takes the job. The housekeeper, Moon-gwang, is harder: she has served the house since its architect owner lived there. The Kims exploit her peach allergy, dusting her with peach fuzz until her reaction looks tubercular, and Mrs. Park — credulous and anxious — dismisses her. With all four Kims employed by the same family under false names and no stated connection to each other, the first half plays as a heist comedy. The film's tone break comes when the Parks leave for a camping trip and the Kims occupy the house: drinking, sprawling on the lawn-facing window, behaving as owners.
What is actually in the basement?
Moon-gwang returns in the rain and begs to be let into the basement. Behind a cabinet is a hidden bunker — built, Moon-gwang explains, by the architect as a shelter from North Korean attack or creditors, and unknown to the Parks. Her husband, Geun-sae, has lived down there for roughly four years, hiding from loan sharks after a failed business, fed in secret by his wife. The two poor families then discover each other, and the discovery does not produce solidarity. Moon-gwang films the Kims' confession on her phone and threatens to send it to Mrs.
Park; the Kims fight to take the phone; Moon-gwang is shoved down the bunker stairs and suffers a fatal head injury. The fight is between people competing for the same single host, not between poor and rich. Geun-sae's devotion to Mr. Park is the film's bleakest joke. He flicks the house lights in Morse code to send the man thank-you messages, and he taught the lights' pattern to Da-song years earlier — the "ghost" that gave the boy a seizure on an earlier birthday. The parasite in the title has no single referent: the Kims leech off the Parks, Geun-sae leeches off the Kims' new employer, and the Parks cannot function without staff.
The ending explained: the birthday party, the smell, and the stone
The Parks return early from the washed-out camping trip and throw an impromptu garden party for Da-song. Geun-sae, having found his wife dead, forces his way out of the bunker, stabs Ki-jung in the chest with a kitchen knife in front of the guests, and is beaten to death by Chung-sook, the Kim mother, who impales him with a barbecue skewer. Da-song sees Geun-sae's face and seizes again. Ki-taek's turn to violence hinges on the smell. Across the film the Parks remark privately that their driver carries an odour — "like an old radish," like "a boiled rag," the smell of people who ride the subway — the one thing money cannot wash out of the Kims. In the chaos Mr.
Park demands the car keys to get Da-song to hospital, and while reaching for them under Geun-sae's body he pinches his nose in disgust. Ki-taek, with his own daughter bleeding beside him, stabs Mr. Park and runs. The stone matters too. Ki-woo takes Min-hyuk's scholar's rock down to the bunker intending to kill Geun-sae, and Geun-sae uses it to smash Ki-woo's head instead. The gift that promised the Kims upward mobility — Ki-woo keeps saying the rock "clings" to him — is the object that nearly kills him.
The final sequence: is Ki-woo's plan real?
Ki-woo survives, with brain damage that leaves him laughing involuntarily. He and Chung-sook are convicted of fraud and given probation; Ki-jung is dead; Ki-taek has vanished, and the police never find him. Watching the house one night from the hill above, Ki-woo notices the porch lights blinking and decodes a Morse letter: his father, who slipped into the bunker during the party, now lives where Geun-sae lived, surviving on the new German owners' pantry. Ki-woo writes a letter back he cannot send. He narrates a plan: make money, buy the house, and let his father simply walk up the stairs into the sunlight on the day the sale closes.
The film then shows exactly that — Ki-taek emerging, father and son embracing on the lawn. Then it cuts back to Ki-woo in the semi-basement, in winter, still writing. The fantasy was a fantasy, and the film signposts it. On the money Ki-woo earns as a tutor, buying a house of that class in Seoul is not a plan but an arithmetic impossibility, which is precisely Bong's point: the only escape the ending offers is one that exists in a letter nobody will read. Ki-taek's imprisonment is permanent, and chosen — he went down the stairs himself.
What the film means: vertical space and the line you don't cross
The Parks are not villains, and that is deliberate. They are polite, generous with money, mildly ridiculous, and never cruel on purpose. Their offence is the pinched nose: a reflexive disgust that tells Ki-taek his labour is wanted and his body is not.
Bong has framed the film's conflict as one with no clear villains and no clear heroes, and the structure bears that out — the deaths are caused by poor people fighting each other. Chung-sook's line about Mrs. Park sets up the reversal: she is "nice because she's rich," not rich because she's nice. The film's view is that kindness is a product of cushioning, and that the moment the cushion is threatened — by a smell, by a stranger in the basement, by a body on the lawn — the goodwill does not survive it.
- Parasite* tells its argument with elevation. The Parks live at the top of a hill behind a gate; the Kims live half below street level, where drunks urinate at their window; Geun-sae lives below that. When the flood comes, water runs downhill — the Parks' lawn dries out while the Kims wade through sewage to salvage a toilet, and the film's long descent from the Park house to the semi-basement is a single staircase shot in stages.
Watching notes and common misreadings
A few details are easy to miss on a first viewing, and a few readings the film does not support: One practical note for viewers: the film's meaning sits substantially in its subtitles and in the class registers of Korean speech, which an English dub flattens. Watch it subtitled, and if you want Bong's own tonal companion piece on inequality, his earlier *Snowpiercer* runs the same vertical logic along a train instead of a hill.
- The scholar's rock is a *suseok*, a collected natural stone displayed as an art object in Korean and Chinese tradition. It is a signifier of cultivated taste — a poor family being handed the trappings of class instead of the substance.
- Ki-woo places the rock in a stream before the final scenes, returning it to where such stones come from and letting go of the ambition it represented.
- Da-song's Native American tent and headdress gear, bought by his mother as American imports, sits above the garden during the massacre — the household's ornamental play-violence over real violence.
- The flood scene is not just hardship: Ki-jung sits smoking on the overflowing toilet, the only Kim who looks unsurprised, which is the film's read on how routine this is for them.
- The film is not arguing that the Kims are blameless. They commit fraud, get a woman fired on a fake medical scare, and cause Moon-gwang's death. The argument is about what the ladder does to the people on it, not about innocence.
Frequently Asked Questions
Does Ki-taek ever escape the basement?
No. The film ends with him still down there, sending Morse code at night. Ki-woo's rescue plan is shown as an imagined scene, then undercut by a cut back to the semi-basement.
Why does Ki-taek kill Mr. Park instead of Geun-sae?
Geun-sae is already dead. Ki-taek snaps when Mr. Park pinches his nose at the smell of Geun-sae's body — the same disgust he has heard directed at his own family all film.
Who is the parasite in the title?
The film applies it to everyone. The Kims live off the Parks, Geun-sae lives off the house, and the Parks cannot cook, drive or raise their children without hired help.
What was the bunker built for?
Moon-gwang says the architect who built the house added it as a shelter from North Korean attack or from creditors, and never told the Parks it existed.