An AI programmer accidentally develops an AI program called Cho Sang Shin which will identify trashy humans and she uses it to save people who are in difficult relationships

Baek Hee Sung changes his identity and hides his past from his detective wife until she discovers he has secrets while investigating a series of unexplained murders

The story of two detectives who work together to unravel the corruption behind a tragedy that happens within a powerful organization

Uhyeon is a popular broadcaster and one day he goes to a family trip into the mountains However his wife and son becomes missing and Uhyeon gets attacked by an unknown figure He manages to survive and the case is investigated by the police

Baseball pitcher Kim Jehyeok becomes a convict overnight after being sent to prison for defending his sister from a sexual assault days before he was due to fly to the US to join the Boston Red Sox

Jung Han a top murder squad detective in the special investigation bureau of violent crimes becomes the sole guardian of his 6monthold niece Eun Ae when his sister and her husband pass away unexpectedly

Han SeungJoo Uee is a single woman in her mid 30s who works as a PD at a broadcasting station She has a hard time dealing with social prejudices about single women To get the position of a married woman Han SeungJoo marries Oh JakDoo Kim KangWoo who lives in the mountain Their marriage is not based on love but their relationship develops romantically

Kim Seojin Shin Sungrok is a successful and workaholic construction company director One day his daughter goes missing with no trace Shortly after his wife Kang Hyunchae Nam Gyuri commits suicide due to the shock Han Aeri Lee Seyoung is a hardworking daughter whose mother goes missing in a hospital She then receives a phone call from Seojin He lives one month ahead of Aeri He asks her to prevent the horrific events that destroyed his family and in return she wants him to find her mother