In the 13th year of King Jij, a daring sea navigator from Ulleungdo Island undertakes a perilous journey across the treacherous southeastern sea route, determined to assert his island's claim over the disputed Dokdo. As he navigates shark-infested waters and battles rival claimants, he must also uncover ancient documents proving the island's historical ownership—all while the unyielding elements threaten to engulf his lone ship.
