HorrorHR Tamnica

1985. In “Sector 7,” an underwater oil field located south of Jeju Island, Hae-jun’s father goes missing in an unfortunate accident on the job. Twenty-five years pass and Hae-jun is now working as a marine equipment manager on an old oil prospecting ship called Eclipse. Also on board are Hae-jun’s boyfriend and marine biologist Dong-su, fun-loving Sang-gu and a clueless new recruit, Hyeon-wu.
Joining the crew later is Jeong-man, a former colleague of Hae-jun’s father, assigned to Eclipse as captain. Though his job is to oversee the withdrawal of the ship, he suggests conducting some drilling one last time. After 3 weeks of preparation, Hae-jun takes Hyun-wu underwater, but the new recruit sinks to the bottom of the sea when the equipment fails. Evidence suggests that it was not an accident and points at one of the crew as a saboteur. Shortly crew members begin to turn up dead, one by one, their bodies viciously mutilated. To make matters worse, the ship is isolated in a typhoon.
What the few survivors soon discover is a transparent underwater creature that they encountered once before. The viral monster infiltrated the ship through the drilling pipe and has been feeding on the crew to survive. Hae-jun and her colleagues’ frantic fight for their lives begins.