Something awaits 8,000 feet under the sea off the southern tip of Jeju Island.
Sector 7 (2011) is a South Korean 3D action horror movie.
According to hancinema.net's article on Sector 7, 3D movies are an untapped territory in Korea. The release of this movie in 3D is significant in the Korean movie history with the hope that it will pave the way for 3D movie market in South Korea.
Synopsis from IMDb: The Eclipse is the offshore drilling rig stationed at Sector 7, a mining area in the vast open sea located off the southern tip of Jeju Island. The oil drilling excavation ends in failure and the crew is given the order to withdraw by the headquarters.
Captain Jeong-man (Ahn Seong-gi) is sent to oversee the crew's withdrawal. However, Hae-jun (Ha Ji-won), the equipment manager opposes the headquarters' order adamantly as she's certain that oil will be discovered in Sector 7. Motivated by Hae-jun's conviction of finding oil, the Captain suggests to conduct one last drilling exercise.
While Hae-jun and the crew are fully engaged in their final attempt, they lost communication with the headquarters and are overwhelmed by the disconcerting feeling that something is out there. As people begin to disappear one by one, the few surviving ones need to think fast and fight for their lives in a non-stop battle against the mutant monster from the sea. Survival looks unlikely, but Hae-jun and the crew are determined to take any chance to get out of Sector 7 alive.
Here's what I have to say: I can't help but to compare Sector 7 to Alien and Ha Ji-won to Sigourney Weaver. The problem is, Ha Ji-won tries too hard to prove that she's a rising South Korean action female star. Blatantly speaking, I find her character as Hae-jun unrealistic and hollow because she takes herself too seriously and I couldn't bother if she will survive the catastrophe. In fact, the rest of the cast seems to suffer the same syndrome except veteran actor Ahn Seong-gi as the elderly captain.
The script seems to be written just for Ha Ji-won and everything seems to revolve around her, especially the movie's climax - the human vs sea monster face-off. Maybe she tries to be Sigourney Weaver or Angelina Jolie, but I think she needs more practice to better her performance in terms of realism and audience relations.
Anyway, if you're a fan of Korean action horror movies, you might want to watch this movie, just to kill time, if you wish.