Man Shik, a native of Haeundae, went deep-sea fishing four years before and lost a co-worker in a tsunami. He now leads a simple life, running a small sushi shop and preparing to propose to his longtime girlfriend, Yeon Hee. While these seemingly banal domestic affairs unfold, a geologist, an expert on tsunami research, discovers the East Sea is showing signs of activity similar to the Indian Ocean at the time of the 2004 tsunami. Despite his warnings, the Disaster Prevention Agency affirms that Korea is in no harm of being hit when he discovers a super tsunami starting in Japan and is headed straight for the Korean peninsula, with only ten minutes to spare!