Kim Da Mi returns with a movie, The Great Flood, in December 2025, after impressing fans with back-to-back K-dramas, Nine Puzzles and A Hundred Memories.

Kim Da Mi and Park Hae Soo from The Great Flood
Last Updated: 12.28 PM, Dec 04, 2025
The Korean industry is not only popular for romance, but also known for apocalyptic and disaster thrillers. All of Us Are Dead, Sweet Home, Dark Hole, Hellbound are some of the K-dramas that have thrilled fans over the years. Now, Netflix is bringing a sci-fi disaster movie, The Great Flood, which made its world premiere at the 30th Busan International Film Festival. Set against the backdrop of a catastrophic flood, the movie depicts the characters’ struggle for survival as they are pushed to the brink.
The Korean movie is skipping a theatrical release and will make its direct digital debut on Netflix on December 19, 2025. Set against the backdrop of a disastrous flood, the film portrays the plight of humans, trapped in an apartment.
The movie features Kim Da Mi and Park Hae Soo in the leads. Da Mi plays an AI development researcher Koo An Na, while Hae Soo plays a human resource security team member Son Hui Jo. Other supporting cast in The Great Flood includes Kwon Eun Seong, Yuna, Kang Bin, Kim Kyu Na and Jang Min Joon.
With a duration of 1 hour and 46 minutes, the movie will focus on the disastrous flood as humans trapped in an apartment struggle for survival. The story centers on Koo An Na, an AI researcher, and her young son who are also trapped in the apartment as the flood water rises.
The duo's struggle for survival gets intertwined with a mysterious high-stakes mission led by Son Hui Jo who could hold the key to humanity's future and must meet Koo An Na's child. The movie combines a tense survival story with a sci-fi mystery about the true cause of the flood. The Great Flood hints that the flood is not a natural disaster, but the disastrous consequence of a possible human action. This adds more layers of mystery to the already-tense story.
The 2-minute-8-second video highlights the desperation of the people trapped in the apartment and their fight for survival, as the flood waters rise to a dangerous level.
The video also highlights Koo An Na's desperate search for her missing son, even as the people in the apartment die horrifically. We also see the Korean Army firing, though we do not know who they are attacking. The trailer highlights a tense scene between Koo An Na and Son Hui Jo. By the end of the trailer, Son Hui Jo's voiceover tells Koo An Na, “You know as well as I do that this is your last day with him”. This line hints that An Na might already know that her son will be taken away from her for some research.
Q. When and where to watch Kim Da Mi's The Great Flood?
A. The Great Flood is releasing on Netflix on December 19, 2025.
Q. Who are the cast of The Great Flood?
A. The Great Flood features Kim Da Mi and Park Hae Soo in the leads, along with Kwon Eun Seong, Yuna, Kang Bin, Kim Kyu Na and Jang Min Joon in supporting roles.