April 1592, Joseon is about to fall as the Wae start Imjin War and occupy Hanyang in 15 days. Taking over Joseon, the Wae assemble their troops in Busanpo, with an ambition to conquer Ming. After a series of defeats, King Seonjo flees to Uiju and Joseon stands on the defensive. Meanwhile, Admiral Yi Sun-shin prepares for a battle to save his country.