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Submersion

Original title: Daehongsu
  • 2025
  • TV-MA
  • 1h 49m
IMDb RATING
5.4/10
13K
YOUR RATING
POPULARITY
14
8
Submersion (2025)
A disastrous great flood sweeps the planet. On what may be the last day on Earth, a desperate fight ensues to save a child from a flooding apartment.
Play trailer1:46
3 Videos
39 Photos
KoreanDisasterActionAdventureDramaSci-Fi

A disastrous great flood sweeps the planet. On what may be the last day on Earth, a desperate fight ensues to save a child from a flooding apartment.A disastrous great flood sweeps the planet. On what may be the last day on Earth, a desperate fight ensues to save a child from a flooding apartment.A disastrous great flood sweeps the planet. On what may be the last day on Earth, a desperate fight ensues to save a child from a flooding apartment.

  • Director
    • Byung-woo Kim
  • Writers
    • Byung-woo Kim
    • Moisés Velasco
  • Stars
    • Kim Da-mi
    • Park Hae-soo
    • Kwon Eun-sung
  • See production info at IMDbPro
  • IMDb RATING
    5.4/10
    13K
    YOUR RATING
    POPULARITY
    14
    8
    • Director
      • Byung-woo Kim
    • Writers
      • Byung-woo Kim
      • Moisés Velasco
    • Stars
      • Kim Da-mi
      • Park Hae-soo
      • Kwon Eun-sung
    • 314User reviews
    • 32Critic reviews
  • See production info at IMDbPro
  • Videos3

    Official Trailer
    Trailer 1:46
    Official Trailer
    Official Teaser
    Trailer 1:31
    Official Teaser
    Official Teaser
    Trailer 1:31
    Official Teaser
    Clip - Risking her life to save her son
    Clip 1:57
    Clip - Risking her life to save her son

    Photos39

    View Poster
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    + 33
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    Top Cast21

    Edit
    Kim Da-mi
    Kim Da-mi
    • Koo An Na
    Park Hae-soo
    Park Hae-soo
    • Hee-jo
    Kwon Eun-sung
    Kwon Eun-sung
    • Ja In (An Na's son)
    Yuna
    Yuna
    • Lee Ji Su
    Kim Min-Gwi
    • Mi Jeong (Looter)
    Ahn Hyun Ho
    • Apt. 1503 resident
    Kim Kyu-na
    • Apt. 304 Resident
    Jung Min-joon
    • Apt.304 resident
    Park Mi-hyeon
    Park Mi-hyeon
    • An Na's mother
    Lee Dong-chan
    Lee Dong-chan
    • Apt. 2002 resident
    Lee Hak-joo
    Lee Hak-joo
    • Sin Ga Won
    Park Byeong-eun
    Park Byeong-eun
    • Lee Hwi So
    Jeon Hye-jin
    Jeon Hye-jin
    • Im Hyeon Mo (An Na's superior)
    Park Ji Won
    • Deaconess
    Jo Seung-yeon
    • Apt. 702 resident
    Kim Su-Kyung
    • Apt. 304 resident
    Seo Suk-gyu
    • Apt. 304 resident
    • (as Seo Suk-Kyu)
    Jung Hyun Chul
    • Apartment Resident
    • Director
      • Byung-woo Kim
    • Writers
      • Byung-woo Kim
      • Moisés Velasco
    • All cast & crew
    • Production, box office & more at IMDbPro

    User reviews314

    5.413.4K
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    10

    Featured reviews

    9Silberfalke

    Unexpectedly even better

    When I see all these "reviewers" with their weird "names/handles" trashing this movie (and others), I gotta wonder if AI has already taken over, lol.

    Seriously, I've been wanting to say that for ages, even if it means a bunch of downvotes. Anyway, I had no idea about this movie and just thought it'd be a typical disaster flick. But then it got all twisty and totally caught me off guard.

    From that point on, I was hooked and got way more than I expected. And I mean that in the best possible way!

    I get that some people might not dig the direction it takes and could be "turned off" by it, but as a SciFi fan, I absolutely loved it.

    The visuals were awesome, the concept was cool, and it brought up some really interesting philosophical questions. If you're open to something different from your usual disaster movie, you might really enjoy it too.

    I don't want to spoil anything, so I'll stop here.

    For me, it's a definite recommendation and a surprisingly good experience.
    5sami2005

    Promising Start, Confusing Finish

    The Great Flood begins on a strong note, drawing the viewer in with an engaging and suspenseful opening. The early scenes set up an interesting premise and create real curiosity about where the story is headed. However, as the film progresses, it gradually loses focus. The narrative becomes overly long, unnecessarily complicated, and increasingly confusing. Subplots pile up without clear direction, and the pacing slows down significantly, making the experience feel dragged and cluttered. By the final act, the film struggles to maintain coherence, leaving the audience more puzzled than satisfied. Overall, The Great Flood starts well but fails to deliver a clear, well-structured payoff.
    5benderpimp

    I feel like abandoning the child

    The movie seemed promising, but the kid keeps ruining everything; he's unbearable! He keeps causing one problem after another. I understand he's a child, but they made him extremely stupid and capricious. He can't even follow a simple instruction, he doesn't follow you, he can't even walk on his own!
    6stevewastedisposal

    Ive waited ages for this film

    I expected great things , and was so excited to see it. I found it abit confusing at times it disappointed me , wasn't awful but wasn't great either , real shame . Good acting skills.

    Started promising.

    Worth watching once at least.

    And now I am just adding characters as my review is too short lol.
    7jonfmac

    Sophisticated story telling that won't be for most people.

    This was a very well done tale mostly told through visualization and with a great deal of sophistication. Those who cannot interpret what they see and must be explicitly told what they were looking at, will not enjoy this story. A good example of this is the changes made to main character's tee-shirt as she relives story iterations. You see it. You are not told about it. If you didn't see that you didn't watch the movie at all. The Marvel universe will better fulfil your needs. Likewise, those who have no idea about how AI works internally, will not understand any part of the story. A Disney production would be more along your lines of interest. Despite the fact the story is about acquiring feelings, those who interpret the world through 'feels' will be completely lost and confused. Not recommended for you folks at all.

    Visually, the effects were stunning as was the acting. The story is very similar in many ways to the Alicization story arc of Sword Art Online, which was rated by most viewers far higher than this story. The reason for this is most likely due to the sophistication and open mindedness of its viewing audience. If you like SAO then you'll like and understand and enjoy this story without issue. Kudos to the actors. All of them were amazing. This was finely woven story telling with elements of science fiction. If you like to think, then this movie is for you.

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    Related interests

    Choi Min-sik in Old Boy (2003)
    Korean
    Helen Hunt and Bill Paxton in Twister (1996)
    Disaster
    Bruce Willis and Taniel in Piège de cristal (1988)
    Action
    Still frame
    Adventure
    Naomie Harris, Mahershala Ali, Janelle Monáe, André Holland, Herman Caheej McGloun, Edson Jean, Alex R. Hibbert, and Tanisha Cidel in Moonlight (2016)
    Drama
    James Earl Jones and David Prowse in L'Empire contre-attaque (1980)
    Sci-Fi

    Storyline

    Edit

    Did you know

    Edit
    • Trivia
      Director Kim Byung Woo said, "Water is called a 'water demon' in disasters, but it is also the source of life. I also thought that if human emotions were expressed visually, they might take the form of a massive, surging wave."

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    December 2025 TV and Streaming Premiere Dates

    December 2025 TV and Streaming Premiere Dates

    Check out our December calendar to see when "Spartacus: House of Ashur" premieres, "Midsomer Murders" returns, and more.
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    Poster
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    Details

    Edit
    • Release date
      • December 19, 2025 (South Korea)
    • Country of origin
      • South Korea
    • Official sites
      • hancinema
      • Netflix Site
    • Language
      • Korean
    • Also known as
      • The Great Flood
    • Filming locations
      • Seoul, South Korea(location)
    • Production company
      • Hwansang Studio
    • See more company credits at IMDbPro

    Tech specs

    Edit
    • Runtime
      • 1h 49m(109 min)
    • Color
      • Color
    • Sound mix
      • Dolby Digital
    • Aspect ratio
      • 1.85 : 1

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