A Man in a Veil - Season 1 Episode 70
Overview: Tae Poong is shocked when he finds out that Dong Ho isn't his biological father. Still, he asks Yu Ra to take the bone marrow biopsy so he can save Dong Ho. He asks Yu Ra who Dong Ho's real father is, but Yu Ra won't tell him. So, Tae Poong decides to find the father on his own.