In Sector 7, an underwater oil field located south of Jeju Island, Hae Jun is working as a marine equipment manager on an oil prospecting ship called Eclipse. 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
