The Great Flood (2025 Film)

The Great Flood (Korean: 대홍수; RR: Daehongsu) is a South Korean disaster science fiction film written and directed by Kim Byung-Woo. The film is scheduled for release on the streaming platform Netflix on December 19, 2025.

Plot

The narrative centers on a catastrophic flood that engulfs the planet. Amidst the disaster, Gu An-Na, an AI development researcher, and Son Hee-Jo, a member of a human resource security team, attempt to survive as their apartment building begins to sink into the rising waters. The story explores the motivations behind Son Hee-Jo's efforts to rescue Gu An-Na and the underlying forces at play during the crisis.

Promotional image for The Great Flood — Promotional artwork for The Great Flood.

Cast

The film features an ensemble cast, including:

Kim Da-Mi as Gu An-Na
Park Hae-Soo as Son Hee-Jo
Kwon Eun-Seong as Shin Ja-In
Jeon Hye-Jin as Im Hyeon-Mo
Park Byung-Eun as Lee Hwi-So
Lee Hak-Joo as Shin Ga-Won
Yu-Na as Lee Ji-Su
Lee Dong-Chan as #2002 grandpa
Kang Bin as a looter
Kim Dong-Yeong as a looter
Eun Su as #1503 pregnant woman
Ahn Hyun-Ho as #1503 man
Lee Jun-Hyeok as security team leader
Jo Seung-Yeon as #702 resident
Park Ji-Won as deaconess

Production

The film is directed and written by Kim Byung-Woo. It is produced for distribution by Netflix, marking a significant entry in the South Korean disaster film genre.