Gang-du works at a food-stand on the banks of the Han River. Dozing on the job, he is awakened by his daughter, Hyun-seo, who is angry with him for missing a teacher-parent meeting at school.

After a series of great white shark attacks threaten to derail the economy of a quiet seaside town, a former local surfing legend and a retired Orca trainer team up to unleash their natural adversary ...