A hitman accidentally kills a little girl. Filled with regret, he wants to quit. But then to tie up loose ends, he is forced to go on another job, to kill the girl's mother.

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.

When South Korean heiress, Yoon Seri, unexpectedly crash-lands in North Korea after a paragliding mishap, her life takes an unforeseen turn.

Soon-tae, aspiring to start his dream restaurant franchise, is nominated as the next boss of the gang. He hopes to pass the role to Kang-pyo, the grandson of the former boss, but Kang-pyo dreams of becoming a tango dancer instead. A fierce competition between two strong candidates begins with the goal of losing the election to pursue their individual dreams! To add chaos to the mix, troublemaker Pan-ho, who is unwanted by everyone, decides to join the boss election!

Mr. Kim is jobless, lost in debt and has been dumped by his girlfriend. He decides to end it all by jumping into the Han River – only to find himself washed up on a small, mid-river island. He soon abandons thoughts of suicide or rescue and begins a new life as a castaway. His antics catch the attention of a young woman whose apartment overlooks the river. Her discovery changes both their lives.

Do Ra-hee, a reporter, is assigned by her boss to report on allegations of sexual assault by Woo Ji-han, an actor. She then investigates the case but uncovers details that may turn it upside down.

Sung-geun is an untalented actor who makes a living playing minor roles. He happens to land on the role as Kim Il-sung, the former leader of North Korea, for the rehearsal of the South-North Korea Summit. Sung-geun becomes passionately immersed in his role, motivated by his son who looks up to him. However, the summit is not realized, and Sung-geun ends up lost in the delusion that he really is Kim Il-sung.

Wannabe actor Joon-cheol is living with his girlfriend who wants to get married. He tries to convince her to get married after he's made his debut but she breaks up with him in the end and kicks him out. Joon-cheol has nowhere to go but a friend of his has to go on a business trip and asks him to take care of his pet cat. However, what's waiting for him is not a cat but a girl with aphasia. Joon-cheol quarrels with his friend about calling the cops and comes out of the house. He goes back to his girlfriend but she doesn't accept him so he starts living with the cat girl.

Saeyoung is a new employee who eventually stands against Leesun, her stubborn team leader. Leesun is upset by Saeyoung's behavior, but she soon learns about ominous stories about Saeyoung. As the stories about Saeyoung are revealed one after another, she becomes a source of fear to Leesun. Saeyoung's stalking-like bullying continues, and Leesun tries to run away from her.

An old man is found dead, and his housekeeper is charged with the murder. Her defense attorney is surprised to learn the only witness to the crime is a teenage girl with autism.