In triangle, episode 4, Huh Young Dal (played by Kim Jae joong) confessed to Hwang Shin Hye (played by Oh Yeon Soo) that he did not have any childhood memories”.
Previously, Young Dal was attacked by the yakuza and asked Jang Dong Soo (played by Lee Beom Soo) for help. Dong Soo saved him and brought him to the police station. He questioned him in the interrogation room but he remained silent. Dong Soo took out his gun to threaten him to speak the truth but Young Dal would not say anything.
Dong Soo eventually asked Shin Hye for help. She gently said, “I’m not here to interrogate you.” Then she asked, “How come you don’t have any records of school and family?” Young Dal confessed, “I don’t remember my past. I remember up to when I was a panhandler at Cheongnyangni Station.”