Soon-tae is a proudly law abiding citizen of Korea, then one day he is wrongly accused and arrested as the main suspect behind the murder of the daughter-in-law of a major company. Despite Soon-tae’s pleads of innocence, he is sentenced death and his daughter is forced to endure the hardships of being a child of a murderer.

Jae-Hyeok (Kim Nam-Gil) lives with his mother (Kim Young-Ae), his sister-in-law (Moon Jeong-Hee) and nephew Min-Jae (Bae Gang-Yoo) in a small Korean town. He is dating Yeon-Joo (Kim Joo-Hyun), while working at the local nuclear power plant. Meanwhile, Pyung-Sub (Jung Jin-Young) works at the same nuclear power plant. He is worried about conditions there, but nobody in the government listens to him. An earthquake strikes the small town where Jae-Hyeok lives and causes explosions at the nuclear power plant. The situation quickly spirals out of control, leading the entire nation to panic. To prevent another nuclear disaster, Jae-Hyeok and his co-workers return to the nuclear power plant.

The employees of a big-box discount retail store band together when contract workers are summarily laid off.

In the early 1980s, South Korea is torn by student protests over the lack of representation in the government. Song Woo-Seok is a successful attorney in Busan specializing in tax law. His views regarding civil liberties are changed by student activist Park Jin-woo. When Jin-Woo is brutally tortured and put on trial for his activism, Woo-seok decides to defend Jin-woo as his client.

On the day the 15-year statute of limitations expired on a high profile serial murder case that claimed the lives of 10 women, a family member of the victim throws himself off the building in front of Choi Hyeong-goo, the detective in charge of the case. Two years later, a man called Lee Doo-seok publishes a book titled “I am the Murderer” claiming responsibility for the murders that took place 17 years ago. His book becomes a bestseller because of the author’s charming looks and his vivid depiction of the crime. The detective and the self-proclaimed murderer meet face to face on a television debate show. Believing that Lee is nothing but a con artist, Detective Choi renews his search for the ultimate truth. Then another man appears suddenly, claiming he is the real killer.