On the episode nine of KBS 2TV's "Beautiful Mind", how Lee Yeong-oh (Jang Hyeok) lost the facility to feel empathetic with other folkswas once revealed.
The flash back scene in this episode showed that Lee Geon-myeong (Heo Joon-ho) carried out a surgical treatment on Lee Yeong-oh (Jang Hyeok).
When Lee Yeong-oh changed into taken to the clinic where Lee Geon-myeong (Heo Joon-ho) was working, Lee Geon-myeong was put in command of the emergency brain surgery. Throughout the surgery, Lee Geon-myeong touched the frontal lobe of the patient's brain by potential of mistake. Since then, the emotional middle in Lee Yeong-oh's brain mayno longerserve as properly.
When Lee Geon-myeong's fellow doctors asked him, "Don't you'll needtell the child's guardians know about this?". Lee Geon-myeong said, "The child's parent is me from now on".