The case is about a naval battle in late October 1597 in Myeongryang, Korea. In that period, the Japanese army was invading the Joseon Dynasty and the Jazun Ara, which was defeated on all fronts. Admiral Yi Sanxin is being recruited for a real battle to boost the morale of the soldiers in an unprecedented battle against 330 warships from Japan. This is the battle in which Joson Castle was at risk of falling into the hands of the dangerous Japanese at the time.
The sea battles are absolutely epic, more realistic and thrilling than John Woo's 2008 "Red Cliff" or even Peter Weir's 2003 "Master and Commander: The Far Side of the World."