Netflix just dropped a South Korean sci-fi disaster film that completely reshuffled the streaming charts. The Great Flood landed at number one globally on December 21, 2025, with 27.9 million views through December 21—absolutely crushing everything else on the platform, including Rian Johnson’s Knives Out mystery.
Here’s what shocked everyone: The Great Flood wasn’t expected to open this strong. This Korean movie premiered at the 30th Busan International Film Festival in September 2025, built buzz slowly through festival circuits, then dropped on Netflix December 19 with zero marketing fanfare. Two days later, it’s the biggest film on the planet. That’s not accident. That’s audience hunger for something different.
What The Great Flood Actually Is
Director Kim Byung-woo (The Terror Live, Take Point) crafted something genuinely wild. The film opens on the final day of Earth. An asteroid collision in Antarctica triggers catastrophic rainfall that’s drowning the entire planet. An AI researcher named Gu An-na (played by Kim Da-mi) gets trapped inside a high-rise apartment with her six-year-old son when the flood hits. Water starts filling the building. Residents start climbing toward the roof. This should be straightforward survival horror.
Except it’s not. As the film unfolds, you discover An-na isn’t just trying to escape. She’s humanity’s last hope. The UN has been running a secret project, and An-na holds knowledge that could either save or doom whoever survives this catastrophe. That sci-fi twist transforms what looks like a disaster thriller into something philosophically darker.
Kim Da-mi, fresh off breakout roles in Itaewon Class and The Witch franchise, delivers a genuinely unsettling performance as a mother forced to make impossible choices. Park Hae-soo (Squid Game, Money Heist: Korea) plays Hee-jo, a security officer willing to sacrifice everything to protect An-na. Their chemistry builds real tension.
The underwater sequences are the technical achievement that’s got people talking. Korean cinema hasn’t featured underwater scenes this complex before. Water fills apartment corridors. Bioluminescent effects light submerged spaces. The apartment building itself becomes a character—this familiar, safe space transformed into a drowning trap. That environmental storytelling hits hard.
Why It Matters
Korean content has dominated Netflix’s global charts for years. Squid Game broke records. Money Heist: Korea captured millions. Culinary Class Wars (Season 2) debuted at number one on the foreign-language TV chart with 5.5 million views the same week. Seasoned viewers knew Korean creators were delivering, but casual streamers were often surprised by quality.
The Great Flood proves Korean sci-fi is advancing. This isn’t just importing prestige drama anymore. This is blockbuster-level filmmaking with intellectual ambition. Critics gave it 47% on Rotten Tomatoes, which sounds middling until you realize mixed reactions mean people are actually talking about it. Some loved the emotional depth. Others found the narrative structure confusing. That debate keeps the film culturally relevant.
Wake Up Dead Man Holds Strong
Meanwhile, Wake Up Dead Man: A Knives Out Mystery remained number one on the English-language film chart for a second week with 20.9 million views through December 21. Rian Johnson’s third mystery film, starring Daniel Craig as detective Benoit Blanc, opened with 20.2 million views the previous week and barely dropped.
This is remarkable for an English-language original. Most Netflix films lose 40-50% of viewers between opening and second week. Wake Up Dead Man dropped only about 3.5%. That retention suggests real word-of-mouth. The film finds Blanc investigating a seemingly impossible crime in a small town where a hot-headed priest gets murdered and a young priest becomes the prime suspect. The narrative mechanics work even if critics weren’t universally praising it.
The Numbers
Here’s the real story: Netflix’s diversity is actually working. Korean content pulled 27.9 million views. English content hit 20.9 million. Foreign-language content continued dominating. The platform isn’t depending on one region or language anymore. Global audiences are searching for quality regardless of origin.
The Great Flood’s rise proves something executives have suspected: audiences don’t care where stories come from. They care about quality execution. Give people fascinating premises, strong performances, and technical ambition, and they’ll find you on Netflix.
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