Located on the southeast tip of the Korean peninsula is the international city of Busan. A popular vacation spot on the East Sea coast, Haeundae draws one million visitors to its beaches every year. Man-sik, a native of Haeundae, lost a co-worker to a tsunami on a deep-sea fishing trip four years ago. He has never returned to sea ever since. He now leads a simple life running a small seafood restaurant and is preparing to propose to his longtime girlfriend, Yeon-hee. Man-sik’s brother Hyun...