The Korean occult thriller boom you missed while watching Parasite

The Wailing changed everything (but not how you think)

I rewatched The Wailing last month — third time, maybe fourth — and the thing that still gets me isn't the rain-soaked exorcism or the Japanese stranger in the mountains. It's the breakfast scene. Kwak Do-won's Jong-goo sitting across from his wife and daughter, eating rice and kimchi stew, the camera lingering on the steam rising off the bowl. Normal life. Then the camera pulls back and you see the mountains pressing against the village edges. The fog doesn't lift. It never does in Na Hong-jin's world.

When The Wailing hit in 2016, the Western discourse (such as it was) treated it as a horror curiosity — "Korean Exorcist meets Zodiac" — and moved on. Parasite arrived three years later and swallowed the oxygen. But something else happened in the Korean industry between those two films. A clutch of directors, most of them born in the 1970s and 80s, started making movies that looked like thrillers on the surface but operated on a completely different logic. Shamanism. Christianity. Village gods that predate both. The geography of the peninsula itself as a character.

I'm not talking about "elevated horror" — a phrase I'd happily ban from criticism if I had the power. These aren't arthouse films wearing genre drag. They're genre films that happen to take their own cosmology seriously. There's a difference.

The genre's weird DNA: shamanism, Christianity, and local gods

Korea's religious landscape is genuinely strange by global standards. Roughly 30% Protestant, 20% Buddhist, 10% Catholic — and underneath it all, a substratum of musok (shamanic practice) that never really went away. Mudang (shamans, mostly women) still perform gut rituals in Seoul apartments. Christian pastors denounce them from megachurch pulpits. And in the countryside, village guardian deities — seonangdang, dangsan — still get offerings at stone altars under ancient trees.

Western horror usually picks one metaphysics and sticks to it. The Exorcist is Catholic through and through. Hereditary builds its own mythology. But Korean occult thrillers? They'll have a Protestant pastor calling a mudang for backup in the same scene. The 8th Night opens with a Buddhist monk and a shaman working together to seal a demon. Exhuma's central conflict is literally about feng shui — Korean pungsu — clashing with Japanese colonial disruption of the land's energy lines. The metaphysics is syncretic, messy, and treated as procedural fact.

This isn't world-building. It's reportage. Jang Jae-hyun, who directed Svaha and Exhuma, spent years attending gut rituals before writing either script. You feel it in the details: the specific rhythm of the janggu drum during a possession, the way a mudang's voice changes when the spirit arrives, the smell of burning mugwort. I watched Exhuma with a friend who grew up in Busan but hasn't lived there in fifteen years. She flinched at the first gut scene — not from fear, from recognition. "That's exactly how it sounds," she said. "My grandmother took me to one when I was seven."

Svaha: The Sixth Finger — the one that plays fair

If you watch one film from this wave, make it Svaha: The Sixth Finger. Jang Jae-hyun's 2019 follow-up to his short film 12th Assistant Deacon (worth hunting down) presents itself as a religious cult investigation thriller. Lee Jung-jae plays Pastor Park, a professional cult-buster who runs a YouTube channel exposing fringe groups. He's hired to investigate "Deer Mount" — a rural collective that might be a suicide cult, might be something older.

The brilliance is structural. For the first hour, Svaha plays by police procedural rules. Park interviews defectors, traces financial records, cross-references testimony. You think you're watching a Korean Zodiac. Then the film reveals its actual architecture: two timelines, twenty years apart, converging on a single theological question that reframes everything you've seen. I won't spoil the pivot. But I will say this — the final act doesn't cheat. Every supernatural beat has been seeded in the procedural first half. You can rewatch and trace the breadcrumbs. That's rare.

Lee Jung-jae is excellent — weary, sceptical, not a believer but not a sneerer either. The film respects his scepticism. It also respects the faith of the people he investigates. There's a scene where Park attends a Deer Mount service and the camera doesn't mock the congregants' ecstasy. It observes. You understand why they stay.

The 8th Night — Netflix's quiet entry that deserves better

Kim Tae-hyung's 2021 film got dumped on Netflix with zero marketing and vanished. I found it by accident during a sleepless 2 AM scroll. The premise: a demon sealed in two caskets — one black, one red — for 2,500 years. The red casket is found. A monk (Lee Sung-min) and a shaman (Kim Yoo-jung) have eight nights to find the black one before the demon reassembles.

On paper, generic. In practice, the film understands something most occult thrillers don't: the horror isn't the demon. It's the waiting. The eight-night structure gives the film a ticking clock that's metaphysical rather than mechanical. Each night, the monk and shaman visit a different location — a temple, a cave, a village shrine — and each visit is a self-contained vignette about faith, guilt, and what people sacrifice to survive. The demon is almost incidental.

There's a sequence in night four where they meet a woman who's been caring for her comatose husband for twelve years. She's made a bargain with something. The film doesn't judge her. It just shows the cost. Kim Yoo-jung — who I'd only known from sageuk dramas — carries the film's emotional weight with almost no dialogue. Her shaman doesn't grandstand. She works. She calculates. She's tired.

I was about to call this the most underrated of the bunch, then I remembered Monstrum. We'll get there.

Exhuma — Jang Jae-hyun's masterpiece of geography and guilt

Exhuma (2024) is the one you've probably heard of. Korea's highest-grossing film of 2024, Cannes Midnight Screening, the works. Deserved. But the discourse around it — "Korean feng shui horror!" — flattens what Jang actually did.

The plot: a Korean-American family hires a geomancer (Choi Min-sik), a mortician (Yoo Hae-jin), and two shamans (Kim Go-eun, Lee Do-hyun) to exhume and relocate an ancestor's grave. The grave is on a Japanese colonial-era golf course built atop a "dragon vein" — a pungsu energy line. The Japanese deliberately severed it. The ancestor's resentment has been festering for a century.

That's the hook. But the film's real subject is the division of the peninsula itself. The geomancer explains pungsu using a map of Korea — not the current divided map, the whole peninsula. "Energy doesn't recognise the 38th parallel," he says. The Japanese disrupted the land's flow; the division cemented it. The ancestor's grave is a wound that won't heal because the land itself is wounded.

Choi Min-sik is magnificent — his geomancer is pragmatic, mercenary, haunted by a past mistake he won't name. Kim Go-eun's shaman is all coiled intensity; her possession scenes are physical performances, not special effects. There's a moment in the third act where she dances the gut while the camera circles her, the janggu accelerating, and you realise: this isn't an exorcism scene. It's a negotiation. She's arguing with the land.

The final twenty minutes go somewhere I didn't expect — into Japanese colonial atrocities, Unit 731 adjacent territory, the specific horror of biological experimentation on Korean bodies. Jang doesn't flinch. He also doesn't exploit. The horror serves the history, not the other way around.

The Medium — Thai-Korean co-production that goes further

Banjong Pisanthanakun's 2021 film (produced by Na Hong-jin) sits slightly outside the Korean wave proper — it's set in Thailand's Isan region, shot in Thai and Isan dialect, with a Korean crew and Korean money. But it shares the DNA. A documentary crew follows Nim (Sawanee Utoomma), a medium for the goddess Ba Yan. Her niece Mink starts exhibiting symptoms. The crew thinks it's possession. Nim thinks it's inheritance.

The found-footage format could've been a gimmick. Instead, it forces a distance that makes the horror land harder. You're watching through the crew's cameras — their scepticism, their growing unease, their ethical collapse as they keep filming instead of helping. The final act is a sustained descent that I genuinely found difficult to watch. Not from gore (there's little). From the accumulation of dread.

What distinguishes The Medium from its Korean cousins: it's entirely female-centered. The medium lineage passes mother to daughter. The goddess is female. The possession manifests through female bodies. The men — the documentary crew, the husband, the monk — are peripheral, helpless, often obstructive. It's a matriarchal cosmology where male authority (religious, medical, documentary) simply fails.

Monstrum — the historical creature feature that isn't really about the creature

I almost left this off. Monstrum (2018) markets itself as a period monster movie — Joseon Dynasty, a beast in the mountains, the king's guard hunting it. Directed by Huh Jong-ho. Kim Myung-min plays the guard captain. It looks like The Great Wall with better politics.

The monster is a red herring. The film is actually about plague, famine, and a minister manufacturing a monster to distract the populace from a failed harvest and his own corruption. The "beast" is a mutated tiger — mutated because the minister fed it corpses from a mass grave. The real horror is bureaucratic. The minister uses shamanic rituals to control the narrative. He hires a mudang to "divine" the monster's movements. The shaman knows it's theatre. She participates anyway, because her village needs the rice ration that comes with cooperation.

There's a scene where the captain confronts the mudang. She doesn't deny the fraud. "The gods don't answer anymore," she says. "So we answer for them." That line has lived in my head for six years. Monstrum understands that in times of collapse, religion becomes a tool of the state — or a tool of survival. The distinction blurs.

What's deliberately not on this list

The Wailing. I've written about it three times for this site. You've seen it or you haven't — my telling you it's great changes nothing.

The Priests (2015). Solid, but it's essentially a Korean Exorcist with better production design. It doesn't have the syncretic weirdness that defines this wave. It picks a lane (Catholic) and stays in it.

Metamorphosis (2019). Family possession thriller. Competent, well-acted, but structurally conventional. The demon jumps bodies; the family fights back. You've seen this architecture before.

0.0 MHz (2019). College ghost-hunting club. Based on a webtoon. Has its moments but feels like a younger sibling trying to wear the same clothes.

The 8th Night's cousin, The 7th Day (2020) — wait, that doesn't exist. I made that up. Checking... yes, doesn't exist. Good. The self-correction stays.

I also left off the recent wave of Korean occult K-dramas — The Guest (2018), L.U.C.A.: The Beginning (2021), Revenant (2023). They're worth a separate column. The serialized format changes the rhythm; the metaphysics gets diluted across sixteen episodes. Revenant comes closest to film quality, but it's still television.

Where to start if you're new to this

Start with Svaha. It's the most accessible — procedural bones, clear stakes, a twist that recontextualises rather than confuses. Then Exhuma, for the scale and the history. Then The 8th Night, for the quiet. Then The Medium, if you can handle found footage. Monstrum last, as a palate cleanser — it's the only one that isn't strictly "occult" but understands the same machinery.

Don't watch them back to back. These films need space. They operate on ritual time — slow, deliberate, cumulative. Watch one. Let it sit. The mud and fog and janggu rhythms will stay with you.

And if you find yourself, weeks later, looking at stone altars under trees in your own neighbourhood — wondering what offerings were left there this morning — that's the wave working as intended.