The boat ‘Junjin’ used to dominate the sea in Yeosoo but it has lost its fame and about to be scrapped. The captain Cheol-joo (Kim Yoon-seok) goes out to the sea thinking that it is the last chance for the junjin. The captain leads his crew including the newbie Dong-shik (Park Yoo-cheon). But what they get to ship is not fish but people! 6 crew members carry stowaways in a thick sea fog and get into an uncontrollable event…