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

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

Jicheol is an incompetent husband and dad He was a detective who got suspended for allegedly taking a bribe Cornered Jicheol makes a dangerous decision Having been a boxing champion in the past he decides to participate in an illegal boxing match and take the prize money

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

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