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The Great Flood is a gripping South Korean science-fiction disaster film that imagines humanity’s final days amid a world-engulfing catastrophe. Co-written and directed by Kim Byung-woo, the film stars Kim Da-mi and Park Hae-soo in powerful lead roles. Set largely inside a submerged apartment building, the story blends survival, sacrifice, and emotional intensity against the backdrop of a global flood. After premiering at an international film festival, The Great Flood is now gearing up for its highly anticipated OTT debut. Here’s everything you need to know about its streaming release, plot, cast, and highlights.
Following its world premiere at the 30th Busan International Film Festival in the Korean Cinema Today – Special Premiere section on September 18, 2025, The Great Flood is set for its global OTT release on Netflix from December 19, 2025. The film will be available in multiple dubbed languages and subtitles, ensuring wide international reach. Its Netflix release allows global audiences to experience this high-concept disaster thriller from the comfort of home.
The Great Flood unfolds in a future where a massive deluge has submerged much of the world. As water levels rise uncontrollably, an apartment building becomes a fragile refuge for the last remaining survivors. Trapped with no escape and dwindling hope, a woman fights against time and nature to save a child, symbolizing humanity’s final spark of compassion. The film explores survival instincts, moral choices, and emotional resilience when civilization stands on the brink of extinction.
Kim Da-mi delivers an emotionally charged performance as Gu An-na, portraying strength, vulnerability, and fierce determination in the face of overwhelming odds. Park Hae-soo adds depth and intensity as Son Hee-jo, anchoring the film’s emotional core. Strong supporting performances by Kwon Eun-seong, Kang Bin, Jeon Yu-na, and others enhance the realism and emotional weight of the survival drama.
Director Kim Byung-woo brings a tense, claustrophobic atmosphere to life with striking visual storytelling. The film’s production design convincingly depicts a flooded world, while sound design and visual effects heighten the sense of urgency and dread. The tight pacing and immersive cinematography keep viewers on edge, making The Great Flood a visually and emotionally engaging disaster spectacle.
If you enjoy disaster thrillers, post-apocalyptic stories, and emotion-driven survival dramas, The Great Flood is a must-watch. With strong performances, a high-stakes narrative, and global relevance, the film offers both spectacle and substance. Its Netflix OTT release ensures worldwide access, making it one of the most anticipated Korean films to stream in December 2025.
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