In 1592, admiral Yi Sun-sin and his fleet face off against the might of the invading Japanese navy and its formidable warships. As the Korean forces fall into crisis, the admiral resorts to using his secret weapon, the dragon head ships known as geobukseon, in order to change the tide of this epic battle at sea.

The film 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.

The Imjin War reaches its seventh year in December of 1598. Admiral Yi Sun-shin learns that the Wa invaders in Joseon are preparing for a swift withdrawal following the deathbed orders of their leader Toyotomi Hideyoshi. Determined to destroy the enemy once and for all, Admiral Yi leads an allied fleet of Joseon and Ming ships to mount a blockade and annihilate the Wa army. However, once Ming commander Chen Lin is bribed into lifting the blockade, Wa lord Shimazu Yoshihiro and his Satsuma army sail to the Wa army’s rescue at Noryang Strait.

Modern day soldiers travel back in time and meet Admiral Lee, the greatest soldier of all time, and motivate him to drive out invaders.

The staff of "The Admiral: Roaring Currents", the biggest film of all time at the South-Korean box office, has assembled once again for a documentary. Critically acclaimed director KIM Han-min and his team delves into the actual background, prelude, and preparations of Admiral YI Sun-sin in 1597 and how the admiral’s battle plans have won him his most remarkable victory throughout his career.

The story of Admiral Yi Sun-sin, the turtle ship, and the crew aboard the ship, which unfolded for two months from the Battle of Hansan to the Battle of Busanpo during the 7-year period of the Japanese Invasion of Korea.

Movie despicting the life and accomplishments of Korean Admiral Yi Sun Shin.

A famous general who defeated Japanese invaders with the world's first iron ship, 'Turtle battleship' during Chosun dynasty, was intrigued against by many villainous retainers. Even when he was reduced to a much lower rank, he served in the war worrying about the nation's wellbeing. This film depicts General Lee Sun-Shin who is probably the most famous general in Korean history, based on his 'Wartime Diary.'

Admiral Lee Sun-shin designs and builds the 'Turtle Ships' in preparation of the Japanese invasion during the Injin War. He is promoted after his victories, but due to his expanding influence and increased popularity in military circles, the king comes to fear him and has him imprisoned. A year later, the Japanese navy attempts another invasion and the king is required to enter the prison and beg the admiral's assistance.