Channel A's 'Detectives' Trade Secrets' aired on the 9th, revealing stories entangled with wounds within family and personal relationships.

■ Biological Daughter Found After 60 Years, Met with a Cold Response

In the 'Detective 24 Hours' segment, the story was introduced of a mother in her 80s suffering from severe dementia and the biological daughter she met after 60 years. The client requested help finding the legal family of his stepmother, who became family about 40 years ago.

The stepmother had once had her biological daughter taken away by her mother-in-law and was driven out of the house, but she had long lived with her biological daughter like a real mother and daughter. Even after her dementia became severe, she remembered her daughter's name and longed for her.

After their investigation, the husband-and-wife detective team found the biological daughter through a hiking club. However, the daughter responded coldly, asking, "Why is someone who abandoned me at age 3 looking for me?" She revealed that after her mother left home when she was young, her father left as well, and she had lived a lonely life. Her words — "From a young age, I went around earning money and lived dependent on others' charity" — were tinged with resentment toward her mother. Still, the daughter said that while meeting right away was difficult, she would like to meet her mother someday. The client said, "Resentment and longing seem to be crossing each other."

■ A College-Age Daughter Missing for Two Weeks, and the Shocking Truth of the Case

In another segment, 'Case Notes,' the story was revealed of a father searching for his college-age daughter who had been missing for two weeks. The client lost his wife seven years ago and had lived with his only daughter; the daughters of his family and his wife's best friend were so close that they attended the same university and the same department.

However, his daughter suddenly went missing, and the police said it was a voluntary runaway and that she did not want her whereabouts known.

The investigation found that on the day of her disappearance, the daughter had a physical fight with the best friend after an argument at a bar they frequented, and afterward stayed at a luxury hotel with the financial support of the friend's father. Behind the case lay a secret romance between the client's daughter and the best friend. The daughter, out of revenge, had an affair with the friend's father. It was also revealed that the friend had relationships not only with the client but also with another married man.

The client's daughter blamed her friend, saying, "It's because you grew up without your father's love that you only meet older men," and the two got into a physical fight. After the truth came out, the client reportedly ended his relationship with his daughter's friend and is working to repair his relationship with his daughter.

■ Panelists: "This Is a True Story?"

Defconn expressed shock at the story, calling it "the worst tragedy created by deprivation," and Yoo In-na said, "This seems to be the most shocking story ever. This is a true story?" One-day detective Tongdak Cheonsa evaluated the client's daughter's behavior as "an overly self-destructive form of revenge."

Meanwhile, Channel A's 'Detectives' Trade Secrets' airs every Monday at 10 p.m.