The film highlights a "collective sacrifice" as passengers initially choose not to land to protect their home country from infection.

Jin-seok, a disgruntled biochemist, unleashes a highly contagious pathogen on Flight KI501.

As passengers die and the pilots succumb to the virus, ex-pilot Jae-hyuk (Lee Byung-hun), who is onboard with his daughter, must overcome past trauma to take control of the aircraft.

The situation escalates into a global diplomatic crisis as foreign countries, including the U.S. and Japan, refuse the plane landing rights, fearing the spread of the virus. Key Themes

Director Han Jae-rim explores how different types of people respond to fear—some with resentment and others with heroic altruism. Cast and Production Emergency Declaration (2021) - IMDb

On the ground, veteran detective In-ho (Song Kang-ho) discovers the plot—only to realize his wife is on the plane.

(2021) is a high-stakes South Korean disaster thriller directed by Han Jae-rim. The film follows the harrowing events aboard a commercial flight from Incheon to Hawaii after a bioterrorist releases a deadly virus mid-air. Plot Overview