Major crimes unit detective Seong-jin arrests Tae-sung for petty crimes, but shocked to find out that he is the notorious serial killer. However, Seong-jin becomes doubtful of his identity as the serial murder case is investigated.

A laid-back countryside detective Byung-su takes his family to the Philippines for his 10th wedding anniversary. In fact, his hidden agenda is to track down his old friend Yong-bae who scammed him and got away a few years ago. In Manila, Byung-su finds Yong-bae in prison for murder, and hears about the case surrounding 'Yamashita’s Gold'. Swayed by a share of the Gold that Yong-bae offers, Byung-su suddenly becomes embroiled in the case.

On March 7, 1997, after losing the election, former lawmakers who were engaged in hiking and fishing opened a restaurant called Harodongseon. Rumors spread that the restaurant was opened by politicians, and it is crowded with customers every day, but they realize that the business is not very easy. This is because various people, including a suspicious-looking monk, a man who looks like a spy, a big autistic child who resembles Ureme, and fussy Gangnam nouveau riche have begun to cross the threshold of the restaurant.

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.