The Admiral: Roaring Currents tells about the naval battle occurring in late October 1597 in Myeongryang, Korea. It is the time when the Japanese Army invade the Joseon Dynasty and Joseon troops ara almost defeated on all fronts. The Citadel Joseon is at risk of falling into the hands of the Japanese. In a situation that the country is at stake, with only 12 ships, Admiral Yi Sun Shin has to boost morale of soldiers in an unprecedented battle against 330 warships from Japan.