Blue is a 2003 South Korea

South Korea

The Republic of Korea , , is a sovereign state in East Asia, located on the southern portion of the Korean Peninsula. It is neighbored by the People's Republic of China to the west, Japan to the east, North Korea to the north, and the East China Sea and Republic of China to the south...

n war film

War film

War films are a film genre concerned with warfare, usually about naval, air or land battles, sometimes focusing instead on prisoners of war, covert operations, military training or other related subjects. At times war films focus on daily military or civilian life in wartime without depicting battles...

 directed by Lee Jeong-guk focusing on elite rescue divers of the South Korea Navy.

Plot

Two friends in the Korean Navy, Lee and Kim are both part of an elite diving squad, specialising in emergency deep sea salvage dives. Lee is straight-laced and takes his duties seriously, while Kim treats the Navy as a lark. When Kang, a diving instructor and Kim's former girlfriend, is posted to the unit, this creates tension between the friends as they compete for Kang's affections. The tension is heightened when Lee is promoted ahead of Kim, creating a rivalry between the two. Kim's gung-ho approach to diving, and the danger he poses for himself (and his fellow divers), leads to further problems. Matters come to a head when an incident at sea causes the sinking of a submarine, requiring the unit to attempt a dangerous salvage rescue of the sunken submarine.

Cast

• Shin Hyun-jun
  Shin Hyun-jun
  Shin Hyun-jun is a popular actor from South Korea. He is well known for portraying Ki-bong in the movie Barefoot Ki-bong and the photographer in South Korea's most popular music video "Because I'm A Girl" performed by KISS. He is best known as 아랍왕자 due to his foreign look and long eyelashes...
  
   as Kim Jun
• Shin Eun-kyung as Kang Su-jin
• Kim Yeong-ho as Lee Tae-hyeon