An undercover cop has his loyalties tested when the boss of the corporate gang he's spent years infiltrating dies.

Kyung-chul is a dangerous psychopath who kills for pleasure. Soo-hyeon, a top-secret agent, decides to track down the murderer himself. He promises himself that he will do everything in his power to take vengeance against the killer, even if it means that he must become a monster himself.

After an accident, Mun-Gi wakes up to find that he’s forgotten who he is. Searching for clues about his life, he meets Yeon-Hwa, who introduces herself as a ghost.

Jung-Woo (Kim Sung-Su) is a neurosurgeon and also works in bioengineering research. He is married, but has an ongoing relationship with Yoo-Gyeong (Han Go-Eun). She is a doctor and stands by Jung-Woo. Yoo-Gyeong has a mysterious accident one day and her hand is cut off in the accident. Thanks to Jung-Woo's quick thinking, her hand is reattached successfully with surgery. Yoo-Gyeong's health improves after the surgery, but bizarre events take place around her constantly.

On the night of April 8, 1997, an innocent college student was brutally murdered in a burger shop washroom for no apparent reason. 2 Korean-American teenagers are brought for questioning and are charged with murder and possession of lethal weapon and withholding evidence. Neither is remorseful for their heinous crimes and blames each other for the killing.

An honest cop has to compromise with his principles when he is told to find a scapegoat for a high-profile serial killer case in exchange for a big promotion.

Oki, a film student, gets involved in two relationships as she navigates the advances of a fellow student and grapples with her feelings for her much older professor.

On March 26, 1991, five boys set off to the mountain to go frog hunting and never come back to their family. While a documentary producer, detective and professor try to solve the mystery of the incident, one of the boys' parents is a suspect.

In August 1950, waiting for UN troops to arrive, the South Korean army assembled to protect Nakdong River. Only 71 student-soldiers are left behind to guard the city of Pohang. Now they are on a mission to defend the country from North Korean troops.

Kwon Yeon-woo is a thirty year old low-level civil servant who works in a district office; quite innocent for his age, he has been on numerous blind dates in an unsuccessful bid to find a wife. After moving into a new place, he begins to encounter a high school girl, Soo-yeong, on his way to work every morning, and she begins to develop feelings for him. Meanwhile, Kang Sook has just started working at the district office straight out of high school, and falls head over heels for older woman Kwon Ha-kyeong.