The Great Flood Cast & Filming Locations

Netflix’s The Great Flood, originally titled Daehongsu, is a gripping South Korean sci-fi disaster film that blends emotional storytelling with cutting-edge visual effects. Directed by Kim Byung-woo, the film envisions a near-future Earth devastated by a catastrophic meteor impact that causes the Antarctic ice to melt, submerging the world under a cataclysmic flood.

The Great Flood Cast: Faces of Survival

One of the standout features of the movie is its powerhouse cast, who deliver intense performances that enhance the film’s claustrophobic tension and emotional depth.

Kim Da-mi (Itaewon Class, The Witch) as An-na, an artificial intelligence researcher and devoted mother trapped in a sinking high-rise.
Park Hae-soo (Squid Game, Money Heist: Korea) as Hee-jo, a rescue agent tasked with saving An-na and her son amid the chaos.
Park Byung-eun (Kingdom, Seobok) as a government operative connected to the AI project.
Jeon Hye-jin (Hunt, Uncle) adds dramatic tension as a senior official with a moral dilemma.
Kwon Eun-seong and young actor Yu-na portray key supporting roles that embody innocence, resilience, and human hope amidst destruction.

Collectively, the cast brings authenticity and emotional realism to the movie’s high-stakes survival narrative, a hallmark of Netflix’s growing roster of Korean sci-fi thrillers.

The Great Flood Filming Locations: From Seoul to Submerged Sets

The filming of The Great Flood took place entirely in South Korea, with shooting commencing in July 2022 and wrapping in early January 2023. Most of the key scenes were filmed in and around Seoul, leveraging the capital’s modern film infrastructure to create large-scale flood sequences under tightly controlled conditions.

While parts of the film appear to unfold in a devastated cityscape, much of the actual production occurred within specialized studios equipped for large-scale VFX and underwater cinematography.

Indoor Shooting Studios: Many of the movie’s intense high-rise interior scenes were filmed at VFX Daejeon Studio Cube and at RF Semi, both known for their advanced production facilities and post-production infrastructure. Studio Cube in Daejeon, in particular, has become a major hub for Korean blockbusters and Netflix originals, offering state-of-the-art virtual production capabilities.
Underwater Filming: The breathtaking submerged apartment scenes and flood rescues took place at Cine Blue in Paju’s Popraza complex — one of Korea’s top underwater filming facilities. With its large-scale water tanks and lighting systems, Cine Blue allowed the directors to capture realistic flood effects without compromising actor safety.

Seoul: The Visual Backbone of the Film

Seoul’s skyline, with its modern architecture and dense urban texture, lent itself perfectly to The Great Flood’s dystopian narrative. The production team reportedly used multiple city locations to depict the post-apocalyptic landscape, including rooftops, bridges, and riverside zones reimagined through CGI as flood-submerged environments.

Seoul’s reputation as a global production hub continues to grow, with its film-friendly policies, advanced sound stages, and talent pool attracting more international co-productions. Films like Parasite, Squid Game, and The Silent Sea have all benefited from this infrastructure, cementing South Korea’s position as a powerhouse in global entertainment.

Dynamic VFX and Korean Storytelling

What truly sets The Great Flood apart is its blend of emotional storytelling and high-end visual craftsmanship. Rather than relying solely on spectacle, director Kim Byung-woo uses water as a metaphor for both destruction and rebirth. The confined high-rise setting amplifies tension, making each scene feel like a breathless struggle against time and fate.

Combined with VFX artistry from Studio Cube and meticulous underwater sequences at Cine Blue, the film delivers a sensory experience that rivals major Hollywood disaster titles while staying uniquely human at its core.

Final Thoughts

Netflix’s The Great Flood is more than just a disaster film — it’s a cinematic reflection on motherhood, technology, and survival amidst overwhelming forces. With a top-tier cast, groundbreaking production design, and meticulously crafted visuals, the movie showcases the evolution of Korean science fiction cinema to a truly global scale.

Whether you’re a fan of high-concept sci-fi or emotionally charged dramas, The Great Flood stands as a testament to the creative power rising from South Korea’s film industry — from Studio Cube in Daejeon to Cine Blue in Paju.