This is the story of a 7-year-old boy, Sang-woo, born and raised in the big city, and his mute grandmother, who has spent her whole life in a small rural village.
In the year 1999, a young woman leaves her quaint seaside house and returns to the city, leaving in the mailbox a card for the next owner, with instructions to forward any mail of hers to the new address. In the year 1997, a jaded young architect moves into the same house and finds the letter. His reply, which he slips into the mailbox, finds its way to her, beginning a parallel-time love story separated by a span of two years.
Two North Korean soldiers are killed in the border area between North and South Korea, prompting an investigation by a neutral body. The sergeant is the shooter, but the lead investigator, a Swiss-Korean woman, receives differing accounts from the two sides.
Miso lives from day to day by housekeeping. Cigarettes and whiskey are the two things that get her through the day. As cigarette prices and rent start to rise, Miso decides to give up her house for cigarettes and whiskey, leading her to couch surf with old friends while reconsidering her place in life.
Soo-jin, who lost her memories due to a horrible incident, starts suspecting her husband. She is confused between reality and illusion, truth and lies.
Ji-wook is a virile detective with a reputation, but deep down in his heart, he always considered himself as a woman and finally decides to get a transsexual operation. However, his plan falls apart as vicious gang members start their revenge on him.
Pil-ju, an Alzheimer's patient in his 80s, who lost all his family during the Japanese colonial era, and devotes his lifelong revenge before his memories disappear, and a young man in his 20s who helps him.
Jong-dae and Yong-ki make a living by picking up paper and empty bottles. Both then join different gangster clan and becomes involved in a struggle of political interests over development in Gangnam, Seoul.
Ancient Korea, July 4, 1762. The Crown Prince Hyojang, posthumously named Sado, son of King Yeongjo of Joseon, is accused of treason. Thus, the king asks him to commit suicide, but his closest vassals prevent it, so the king orders the prince to get inside a wooden rice chest, where he suffers deprivation of food and water.
A serial killer murders a girl from his neighborhood. The residents begin to suspect him one by one, as he tries to cover his tracks and plans another kill before escape.
Min-jae, a rookie police officer with a natural born talent for driving, is assigned to the perfect team: the Hit-and-Run Squad. But at the same time, for police detective Si-yeon, it is a place she is unjustly demoted to for doing her job. The two team up to arrest the rich and powerful speed maniac Jae-chul who is suspected of committing crimes for his obsession for speed.
Cho-in has special powers that allow him to control everyone he can see, that is until he meets Kyu-nam, the only person he can't control. A series of events begins a confrontation that pushes both men to the brink.
Hong Seol, a student from a poor family, meets a rich Yoo Jung, who is her senior at her university. They both develop a rather inconvenient relationship after knowing each other.