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.
A struggling restaurant owner, caring for his sick mom, finds a bag of cash in a sauna locker, while a customs officer gets into trouble when his girlfriend runs off with money he borrowed from a loan shark.
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.
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.
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 woman gets kidnapped in the middle of the day and is tortured in a psychiatric hospital. A Journalist gets on the trace of the case and tries to find out the truth.
Hae-young is a hopeless girl. She lives with her father who runs a Chinese restaurant, and a younger sibling. One day, her father has a mysterious accident, which places her in a position of responsibility. She is now not only the head of the house and must look after her younger sibling, but also an investigator tasked with finding the truth about the accident, and a fighter standing against the ugly world.
Bo Young moves into the mansion of the previously wealthy grandmother, Wang, as a caregiver with a dangerous intention. Mother Kim, the only blood relative of Wang who hired Bo Young, sets conditions such as 'Do not bring anyone, especially children,' and 'Do not go near the reservoir'. Ominous and bizarre signs continue in grandmother Wang's huge mansion located next to a reservoir called 'Gwimot', where people are dying, and Bo Young finds out that foreigners who have visited the place have suffered a mysterious death...