Netflix The Great Flood Review: Disaster Movie with a Huge SF Twist Release

Netflix The Great Flood Plot & Ending: Is it a Disaster Movie or SF?

The official poster for the Netflix film The Great Flood

I love disaster movies, and "The Great Flood" was one of the movies I was waiting for this year. I watched it on Netflix as soon as it was uploaded on Friday night. At first, I thought it was a normal disaster movie, but it has a very big twist. Here is my summary and review of the story.

The Great Flood – Cast, Genre, and Release Date

  • Date: December 2025 (Netflix)
  • Genre: SF  · Adventure · Action
  • Running Time: Approx. 120 minutes
  • Rating: 15+

Main Cast

  • Kim Da-mi as Goo Ahn Na
  • Park Hae-soo as Park Hee Jo
  • Kwon Eun-seong as Ja-in

The Beginning: A Sudden Flood and Escape

The movie starts like a typical disaster film. Suddenly, a huge rain hits the city, and the apartment where Goo Ahn-na lives starts to sink. The water rises very fast. Before she can pack anything, she has to run away with her son, Ja-in.

Then, Ahn-na’s company calls her. They say they are sending a helicopter and a security guard, Hee-jo, to save her and her son. The main goal in the beginning is simple: Can they reach the roof and get on the helicopter safely?

Ahn-na carrying her son Ja-in on her back while escaping a flooded apartment building during a heavy rainstorm in 'The Great Flood'
Image by Netflix

The Hard Way to the Roof: Testing a Mother's Love

The way to the roof is very difficult. While climbing up the sinking building, Ahn-na loses her son's medicine (he has low blood sugar). She has to break into another house to find help and faces many hard choices. They meet a tsunami and almost drown, but finally, they reach the rooftop.

The Big Twist: AI and the 'Emotion Engine' (Spoilers below)

Ahn-na wearing a white T-shirt with the number 21499, standing next to Hee-jo who is holding a gun for protection in a hallway
Image by Netflix

▼ Spoilers Below ▼

In the middle of the movie, the story completely changes. This flood was not just a natural disaster. An asteroid hit Earth, and humans are trying to survive by creating AI. The technology is ready, but there is one problem: AI does not understand human "emotions" like love.

Actually, Ahn-na is a scientist who studies how to turn memories into data. Her son, Ja-in, is a prototype AI created for this experiment. Every moment of love and bonding Ahn-na experienced with Ja-in was actually a controlled data collection process designed to harvest the "human heart".

Over 20,000 Trials: The Meaning of the T-shirt Number

The company needs Ahn-na for their research, but they don't care about Ja-in anymore once they get the emotional data from him. In the end, they just take the data and leave Ja-in behind like he’s trash. As Ahn-na is forced onto a helicopter to go to the lab, she has to leave Ja-in all alone. She feels so guilty for not being able to protect him. To make things right, she decides to connect her brain to the system, so she can share her love and motherly feelings with the new AI that will be born.

From the middle of the movie, we find out that all of Ahn-na’s pain was actually a deep learning simulation for AI. If you look at the number on her T-shirt, you can see she repeated the exact same day 21,499 times. After facing so many obstacles, she finally finds Ja-in and proves her motherly love. This is how the data is successfully collected. For Ahn-na, it was a truly sad and cruel process.

My Review: Is the Great Flood a Disaster Movie or Human SF?

Don't let the title fool you. 

If you want a normal disaster movie like Haeundae, you might be disappointed. This movie is more of an SF drama about motherhood and technology. It reminded me of the movie Interstellar, where a father’s love for his daughter saves the world.

Instead of just showing the flood, this movie asks: 'Can AI really learn and feel emotions taught by humans?' It is a good movie for those who like mysteries and SF. But if you are only looking for a disaster film, you might not like the twist.

*This review is based on my personal experience, and results may vary for others. Please take it as a friendly reference.

Comments

Popular posts from this blog

The Price of Confession Ending Explained: Netflix Korean Thriller Review