Roaring Currents tells the story of the Battle of Myeongnyang on October 26, 1597, that saw Admiral Yi Sun-sin defeat a fleet of over 300 Japanese ships with just 13 of his own.

The victory was a turning point in the war against the invading Japanese and Yi Sun-sin is a well-known historical figure/big damn hero to Koreans still.

Choi Min-sik plays Yi Sun-sin who was tortured by his own people and demoted earlier because Japanese agents framed him for being a traitor. After other commanders squandered the power of the Korean fleet until it was deemed worthless, Yi Sun-sin regained control. He was ordered to meet up with the ground army and disband the fleet altogether but instead looked…