movie tells us story of the battle for Roaring Currents during the invasion of Japanese to Korea in 1597. the main character of the movie is Admiral Admiral Yi Sun-Shin who fought with 13 ships against 133 ( 330 in movie ) and he really was a legendary navy admiral in real life , on same level with Nelson . the best thing in the movie are the navy battles scenes , its the best navy war movie i have ever seen in my life its just pure joy to watch those massive battle scenes loved it , the battles are similar to some other Korean movies like ( Mu SA or Arrow the ultimate weapon ) . however the movie suffers from character development , there are some cheesy moments that feel totally not necessary. Japanese people look like evil guys without personalities overall i recommend to see it , even if you wont like the whole movie , you will definitely enjoy amazing navy war scenes which are like half of the movie .