The populace of a South Korean island rebels against police brutality. The protesters are labeled as communists, and the army is dispatched.

Yeong-joo, a former synchronized swimming athlete goes to Jeju Island to put together a synchronized swimming team for a performance. She slowly befriends the haenyeo, or female divers, and gradually begins to fit into their way of life.

Pong Ddol dreams of forming a band, but money is a problem, and there's little chance they'll find any. Pong Ddol offers Chul-wook the job of band manager if he helps with financing.