Roaring Currents mainly follows the famous 1597 Battle of Myeongryang during the Japanese invasion of Korea (1592-1598), where the iconic Joseon admiral Yi Sun-sin managed to destroy a total of 133 Japanese warships with only 13 ships remaining in his command. The battle, which took place in the Myeongryang Strait off the southwest coast of the Korean Peninsula, is considered one of the greatest victories of Yi.
Roaring Currents (a.k.a. The Admiral) became the biggest film of all time at the South Korean box office, and the first local film to gross more than US$100 million. That is insane considering the small amount of hype the film has gotten. The thing that got me interested was that Choi Min-sik (Oldboy) plays the titular admiral, and he's an actor I never will stop keeping an eye on.
Roaring Currents is, as one would have guessed, a huge and epic war movie. The second half is basically an enormous naval battle with bloody fights sprinkled in-between. Recommended for those who like action packed period films which are based on true events.